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Heart Rate

Summary:

Chapter 1 summary: You stop by Dr. Zayne’s office – at his urgent request – to review some unusual heart monitor activity. To your embarrassment, it appears your anomalous reports line up with some…intimate activity you had been engaging in over the last few weeks with Sylus. While trying to assure Dr. Zayne that nothing is amiss, Sylus sweeps in and proceeds to demonstrate precisely what has been causing your monitor to spike.

General overview: A story of your budding relationship with Sylus and Zayne, where you have to engage in clear communication around consent; you have a heart condition, and Dr. Zayne is your cardiologist.

Notes:

My first Ao3 publication, and my first attempt at writing fanfiction. Love and Deepspace has got me down bad; I haven't written smut in 10+ years, but this idea wouldn't leave my brain. Hope you enjoy!

(See the end of the work for more notes.)

Chapter 1: The chair

Chapter Text

Tap tap tap.

You lower your hand and wait for the office door to open, nervously shuffling your weight from one foot to the other. While the hospital is familiar territory, you’re unsettled by the urgency of the message you received from your cardiologist about your recent heart reports.

You hear muffled footfalls approach, and then the door in front of you cracks open. A tall man with black hair and a piercing hazel gaze stands before you, his stern expression softening slightly when he sees who is at the threshold. He’s wearing his typical hospital garb: a white lab coat, dark pants, and shiny black shoes.

You clear your throat, but before you have a chance to say anything, Dr. Zayne breaks the silence. “Ah, Angel. You received my message. Please come in.”

Dr. Zayne opens the door wider and steps aside for you to enter. Your eyes sweep the office, and you can see he’s partway through eating; his lunch sits half-eaten on his desk. He gestures for you to sit, and you slide into the chair, your dusty rose skirt fluttering slightly around your knees as you cross your ankles. Dr. Zayne circles to his chair and sits, sliding his partially consumed stir-fry and a stack of reports to the side of his desk.

You clear your throat again before you dive in, forgoing pleasantries as your anxiety gets the best of you. “You wanted to see me, Dr. Zayne? Your message sounded urgent.”

“Yes, I did. I was reviewing your heart monitor activity to ensure you weren’t over-extending yourself, and I found some data points that might be cause for concern.” Dr. Zayne glances from his computer monitor to the tracker on your wrist that continually monitors your heart rate. He pushes his glasses up the bridge of his nose as he turns back to the computer. “Do you have your agenda on you to compare?”

“Yes, of course.” You quickly fish your phone out of your purse and open your calendar application, which you keep roughly up-to-date for this very purpose.

“All of the data points are from the last few weeks. I’ve got…Monday, February 17th at 2:30pm?” Dr. Zayne’s gaze turns to you, his fingers hovering over the keys as he waits for your response.

You scroll back a few days to check. “Work. There was a Wanderer attack in the N109 zone. I may have over-done it a little…”

Dr. Zayne raises an eyebrow but doesn’t press for details. He turns his attention back to the screen and types a quick note. You mentally kick yourself; your presence in the N109 zone is a special project that few are aware of. You didn’t mean to let that detail slip in.

Dr. Zayne finishes typing. “Next, I’ve got the same Monday at 8:00pm.”

You scroll a little further and hesitate. “Exercise,” you reply vaguely.

“…Exercise?” Dr. Zayne’s hazel gaze meets yours as you glance up from your phone. He sounds skeptical. “Your heart rate was higher here than at 2:30, what type of exercise were you engaged in?”

“I was boxing,” you reply, un-crossing and re-crossing your ankles.

“I didn’t know you took up boxing…” Dr. Zayne frowns, his brow furrowing as he turns back to the computer to take notes. “This might explain your other evening heart rate spikes this week. This might be too strenuous an activity for your heart condition; we should monitor this moving forward, just in case.”

“Absolutely. I should have consulted with you about it.” You feel your face get a little warm and try desperately not to think of Sylus sweeping your legs out from under you. Or the way his hands and chest had pinned you to the mat when you didn’t get up fast enough. Or the way his tongue had slowly swept up your neck while you tried to squirm out of his grip. …Or what he had whispered in your ear, a promise for the night ahead.

“…Angel?”

Your eyes snap up to Dr. Zayne, who is looking right at you, expectantly waiting for…something. You totally missed what he said. “Sorry, could you repeat that?”

His gaze lingers on your face a moment longer, before he turns back to the computer. “I said the next anomalous spike was the same Monday at 11:00pm.”

You glance at your phone and scroll down. Your heart stutters, making the tracker on your wrist beep. Dr. Zayne’s gaze drags from the computer, to your wrist, to your face. You avoid his gaze; your face feels like it is on fire. “Erm…more exercise?”

“…What kind of exercise were you participating in that late?” Dr. Zayne pushes his glasses up his nose. Your heart flutters. You feel like a butterfly on display, pinned to the chair with his gaze. “You already -”

Everything happens quickly: a swirling cloud of red and black mist appears in the office, Dr. Zayne knocks his chair back as he shoots to his feet, and you cover your face while you sigh heavily. A man materializes from the mist. He has silver hair, shocking ruby irises, and is slightly taller and broader in the chest than Dr. Zayne. He’s wearing an expensive-looking suit, his black silk shirt brushed in bold strokes of red. And, as is his standard, his lips are curved upwards in an infuriating smirk.

Dr. Zayne looks back and forth between you both, lowering the hand he had raised in front of himself. His jaw ticks slightly. “Based on your lack of reaction, Angel, it seems you two know each other. Sir, we’re in the middle of a private consultation; I’m afraid I have to ask you to leave.”

Sylus’s smirk grows. “You must be the renowned Dr. Zayne. Charmed. I’m exercise.”

“…Your name is Exercise?” Dr. Zayne’s voice is flat, a dead giveaway that he’s not pleased about the current situation.

“No, his name – ” you start to chime in before Sylus cuts you off.

“Sure. At 11:00 Monday night, 11:30 Tuesday night, 11:00 Wednesday night…and then again at midnight. Do those match your spreadsheet, doc?” Sylus tilts his head to the side, crossing his heavily muscled arms across his chest.

A smaller cloud of red and black mist pulls Dr. Zayne’s chair forward until it gently taps the back of his legs. He glances down at the chair, then slowly lowers himself into it. Looking back at the computer, he cross-references the dates and times before looking back at you. “Is this your boxing instructor, Angel? He seems to know precisely when your heart rate is spiking.”

“Yes, this is Sylus and he is my…boxing instructor. We’ve been practicing every night this week.” You try not to fidget while keeping your gaze trained on Dr. Zayne. You just know Sylus’s grin is stretching even wider beside you.

Sylus uses his evol again to pull a chair over for himself, which he reclines in with unnerving grace and composure. He gives a small chuckle. “Oh, kitten. You’re really going to lie to your cardiologist like that?”

You feel your face getting hot again as Dr. Zayne frowns slightly, his hazel gaze flicking to Sylus’s crimson. “Do you have additional information to share, Mr. Sylus?”

“I really don’t think – ”

Dr. Zayne looks at you over the top of his glasses. He waits silently for you to continue. You breathe in deeply through your nose, clear your throat, and try again.

“What I mean to say, is – ”

“We’re fucking.”

You turn to Sylus, mouth agape in mortification. It feels like someone has turned the temperature up several degrees in Dr. Zayne’s office. “Really, Sylus?” you hiss under your breath.

“I’ll make note of that in your chart. That…could definitely explain the prolonged increases in your heart rate. Are there any other strenuous activities that I should be aware of?” You can see a faint trace of pink spreading across Dr. Zayne’s cheeks and the tips of his ears. He is determinedly not making eye contact with you or Sylus.

“No, I think that’s everything. Sorry to keep you from your lunch, we’ll be going now.” You stand up quickly, intent to usher Sylus out of the room. But when you turn to Sylus, his grin has only grown wider. He’s staring at Dr. Zayne, one of his eyes is faintly glowing red. Dr Zayne has flushed an even deeper shade of pink; his throat bobs as he picks up his reports, still not looking in your direction.

“Now, now, sweetie. Let’s not be hasty. The good doctor still has, what, thirty minutes left of his lunch break? Given that you’ve caused him to worry about you and interrupted his break, don’t you think you should make it up to him?” Sylus cocks his head to the side, and Dr. Zayne’s hands stop shuffling his papers. His gaze drags up slowly until it meets yours, and it looks like he’s momentarily stopped breathing.

The tracker on your wrist gives a cheerful beep, and your placating smile grows increasingly forced. “I’m sure Dr. Zayne would like to return to his lunch in peace, Sylus.”

“I wouldn’t be so sure of that, kitten.” Without so much as lifting a finger, red and black mist gently pulls Zayne – still seated in his chair – around the desk. Zayne’s eyes widen minutely. “Why don’t we give the good doctor a demonstration? So your chart will be accurate, of course.”

“I really don’t think that’s necessary.” You turn away from Dr. Zayne to encourage Sylus to leave the office with you, when you find yourself wrapped in the mist. It tugs you firmly backwards and drops you rather unceremoniously in Dr. Zayne’s lap. His hands lightly catch your shoulders when you collide, and you hear a sharp intake of breath behind you as you try – and fail – to disentangle yourself from your cardiologist’s lap.

“I hardly think this is appropriate.” Dr. Zayne’s voice is cool and collected, but you can feel his heart beating erratically where his chest presses against your back.

“Don’t worry, doc. I’ll make sure you have plausible deniability”. Sylus’s voice is smooth as silk. He slowly rises to his feet and prowls towards you; all you can envision is a panther slinking towards a meal. His eyes lock onto yours, and you can feel your heartbeat speed up as the mist curls around you once more. Your legs are gently pried open, the mist trapping your ankles against Dr. Zayne’s. Dr. Zayne removes his hands from your shoulders and firmly grips the arms of his chair; you can’t see his face, but you can feel his tension in the rigidity of his body.

Sylus stops beside the chair you both occupy, towering over you. He leans down and softly brushes your hair back from your face. He drags his thumb slowly down your jaw, grips your chin, and gently turns your head towards him. As your gaze flickers from his eyes to his mouth, he smirks. With a twinkle in his eye, he presses his lips to yours. You try to resist, but his warm lips and soft touch have your eyelids fluttering shut against your better judgment.

You can feel Dr. Zayne’s soft breath against your cheek. The scent of the two men starts to mingle: Zayne’s cool, crisp mint with Sylus’s warm, rich leather. It’s a heady mix, and you can feel your breath coming a little faster as Sylus deepens the kiss. His tongue slides languorously against your bottom lip, and you part your lips instinctively. Sylus’s tongue sweeps into your mouth, and your tongues do a familiar dance. The moment gets away from you; a gentle moan escapes your lips, and your eyes fly open in horror. You pull back from the kiss and turn, wide-eyed, to Dr. Zayne.

“Shit, Dr. Zayne, I’m really sorry about this.” You awkwardly try to find somewhere to place your hands to push yourself to your feet, and when your hands make contact with Dr. Zayne’s wrists, you inhale sharply and look down. He’s still gripping the arms of the chair firmly, and there’s a thin layer of frost spreading from his palms.

“It seems like the good doctor’s control over his evol is slipping,” Sylus purrs as he stands up straight, letting go of your chin. “Now, I wonder what might be causing that?”

Sylus struts to tower in front of you, waits until you look him in the eyes, and then sinks to his knees in front of you. You hear Dr. Zayne’s breath hitch. Sylus places his hands on your knees, rubbing his thumbs in soothing circles. Those circles slowly make their way under your skirt up your bare thighs, inching higher and higher.

In just a few moments, Sylus’s fingers hook in the gusset of your undergarment, and he stills. “Now, kitten, the choice is yours. Yes or no?” He makes direct eye contact with you, all usual traces of his smirk gone. He waits for you to answer, and you know this is as far as he will push this if you ask him to stop.

“I don’t think Dr. Zayne is interested – ” you start to babble.

Sylus’s eyes dart over your shoulder then back to your face. “I don’t think you need to worry about that, sweetie. He looks awfully…eager for your demonstration.” The smirk starts to re-appear. “How about it, doctor?”

Dr. Zayne roughly clears his throat, and you feel him adjust slightly beneath you. You’re pretty sure you feel him nod behind you. Sylus’s grin widens. He slowly slides his finger up and down, and your breath catches again. Sylus stills once more, arching an eyebrow at you questioningly.

“Alright, fine.” You acquiesce, feeling warmth spread across your cheeks in embarrassment. You’re not used to such…public displays, and your relationship with Dr. Zayne until this point has been strictly professional. You hear a click and look up to see a wisp of mist fading from the door handle; Sylus used his evol to lock the office door. Without breaking eye contact with you, Sylus slips your lacey thong off your hips and down your legs, his hands and the scant fabric passing through the mist still trapping your legs to Dr. Zayne’s like it doesn’t exist.

“My, my, kitten. These are awfully wet, hmm?”

You watch, mortified, as Sylus balls up your used panties, and then reaches behind you to slide them into the breast pocket of Dr. Zayne’s white lab coat. You swear you feel the doctor’s leg twitch slightly underneath you, but he doesn’t say anything.

Sylus’s heated gaze returns to yours, and he maintains eye contact. He leaves one hand on your inner thigh, brushing gentle strokes into your skin with his thumb. He curls the index finger of his other hand and drags it slowly up and down your slick folds, watching hungrily as your eyes widen and your lips part slightly. He repeats the motion again and again, unhurried, only switching his movements when he hears your breath start to become uneven.

“Good girl,” he purrs, pulling his hand away. You make a small noise of protest that quickly fades in shock as Sylus lifts the finger coated in your essence and reaches it behind your head. You hear a distinctly wet noise; Dr. Zayne makes a low noise in his throat, and then the hand is back between your legs. You gasp when the finger, now slicker, glides gently inside of you. Sylus’s other hand stops drawing on your thigh, and he grips your leg gently as he shifts his weight forward. He pushes your skirt up your legs.

You notice Dr. Zayne’s warm breath on your neck at the same moment you feel Sylus’s warm breath much lower. A shiver works its way up your spine, and then Sylus’s tongue makes contact with your skin. Your back arches, your hips pushing towards his mouth. Your upper back presses firmly against Dr. Zayne’s chest. Your hands rush up to tangle into Sylus’s soft hair, pulling him closer, closer.

A moan escapes your lips as Sylus’s finger starts to slowly drag in and out of you, his hot tongue swirling around your clitoris. Your head falls back against Dr. Zayne’s shoulder, your breath coming faster, faster. “Yesss,” you breathe. Your eyes flutter closed, only to snap open when you feel a cool, comforting hand rest tentatively on your shoulder. The graceful fingers curl slightly, applying a little pressure and holding you against his chest.

Sylus notices the movement. He looks up, continuing to move his hand in and out of you at an agonizingly slow pace. He sucks gently at your skin, then withdraws, a grin slowly crossing his face. He rises up, your hands falling to your knees as you pant. He turns your face to his and claims your mouth in a luxuriously possessive kiss; you can taste yourself on his lips and tongue. He removes his hand from between your legs, eliciting a muffled moan from you that is lost in his mouth. You hear another wet noise over your shoulder, and distractedly you realize you’re all tasting the same thing: you. You gasp, and your head falls back on Dr. Zayne’s shoulder again as two wet fingers push themselves inside of you.

Sylus’s grin widens as he watches you try not to fall apart, his fingers stretching you as they glide in and out of your warmth. You feel the hand at your shoulder drag slowly across your collarbone, coming to rest on your opposite shoulder. Dr. Zayne’s grip is gentle, but the weight of his well-toned arm across your chest holds you firmly against his body. You feel Dr. Zayne shift slightly. His breath is a bit ragged, and your eyes go wide as you feel a distinct twitch beneath you. You try to sit up, but his arm holds you in place. All you succeed in doing is accidentally rubbing yourself against Dr. Zayne’s hard length. You hear a sharp intake of breath beside your ear.

Sylus chuckles darkly as he kneels between your legs once more, and then his mouth is on you. One of your hands latches onto Dr. Zayne’s arm, the other tangles in Sylus’s hair. Sylus’s hand moves faster, his tongue circling your clitoris sharply, pulling soft moans from deep within you. He reaches for you with his other hand, grabbing onto your hip and sliding you along Dr. Zayne’s lap, crushing you against his mouth. Dr. Zayne’s breath stutters once more, his hips shifting slightly.

The tracker at your wrist starts to beep, and you feel Sylus grin against your flesh, still working you with his tongue. Dr. Zayne’s grip tightens on your shoulder as you start to grind into Sylus’s fingers, meeting him thrust for thrust. “Yes, kitten, it’s time for you to come undone,” Sylus murmurs. He changes the angle of his wrist, his fingers curling slightly inside of you to press against your most sensitive spot. He hums happily against you, alternating between rhythmic licking and sucking.

You groan louder as you become more desperate, continuing to grind your hips onto Sylus’s mouth and fingers. You feel Dr. Zayne twitch underneath you again. A cool hand gently clamps across your mouth, quieting the volume of your moans. You pant harder as the pleasure builds, your tracker beeping again and again. Sylus sucks on you once, twice. “Come for me, Angel. Dr. Zayne has to get back to work.”

Your legs press open wider, pushing firmly against Dr. Zayne’s. Your hands find the arms of the chair, your grip a vice as your back arches involuntarily. Your eyes roll back, your vision going dark as the pleasure builds to a peak, crashing over you in wave after wave; Dr. Zayne’s hand over your mouth muffles your scream. Your whole body shudders again and again as Sylus continues to caress in and out of you, his tongue firmly stimulating your clitoris. He keeps going at the same speed until he feels your body start to melt, the convulsions coming less frequently. The tracker at your wrist stops beeping. Dr. Zayne removes his hand from your mouth, the fingers from his other hand whispering across your clavicle. His hands settle on your biceps, his touch feather-light.

Sylus eases his fingers out of you, stands up, and tugs the hem of your skirt back to your knees. He drags the back of his hand across his chin and lower lip, taking in the sight before him hungrily. You lie collapsed across Dr. Zayne, your skin luxuriously flushed. Your mouth is open, your breath still coming in sharp pants. He moves closer, stroking the thumb of his clean hand down your cheek. “Well done, kitten.” Holding your gaze, he sucks one of the fingers covered in your juices into his mouth, making an exaggerated slurping noise. Then he turns your head slightly to make you watch as he slides his other finger into Dr. Zayne’s mouth. Your eyes widen as Dr. Zayne’s eyes flutter closed; his cheeks are flushed, and you can see his throat work as he sucks on Sylus’s finger. He swallows once before Sylus removes the finger from his mouth.

Your tracker beeps once more at your wrist, making you jump. Dr. Zayne opens his eyes, his hungry gaze falling to yours. He squeezes your arms ever-so-slightly, and his lips open like he is about to say something.

You hear a sharp knock, and you all freeze. A muffled voice comes from the other side of the door, “Dr. Zayne, are you in there?”

Sylus is the first to recover, his grin stretching wide. “Catch you next time, doc. Hope that’s good enough for her records.” He gathers you up in his arms, lifting you from Dr. Zayne’s lap as if you weigh nothing. The next moment, Sylus’s red and black mist encircles you both, whisking you out of the office and the hospital.