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Banner hadn’t been able to sleep for the past week, the memories were too vivid. He’d always known his alter ego was dangerous, that he would one day do something beyond Bruce’s worst imaginings. But he hadn’t expected it to come to this, Hulk’s rage had seemed too pure before this... he felt sick every time he remembered the screams, or got a flash of that pale body thrashing beneath him. All it had taken was a suggestive comment from Loki, a playful bite intended as a mind-fuck, a squirm of legs, and then the Hulk had been on him.
The good doctor hadn’t been able to face Thor since; it hadn’t gone unnoticed but he just couldn’t come up with an explanation, or even a way to explain. He should admit everything, come clean, tell them why they hadn’t even seen Loki since it had happened, tell them that he could be dead of massive internal injuries inflicted by Bruce’s worst half and take whatever consequences came of it. They’d known he was dangerous when they’d dragged him into this plan, he’d told them so himself.
There was no point to trying to do any work, not with his thoughts so pre-occupied, but he went through the motions anyway, entering his lab and pulling out the files he needed. He’d at least try to get something done, try to take his mind off it.
As he spun his chair around he heard a voice that turned his insides to ice-water. “Hello, Bruce.” The god of mischief was sitting on his desk, smiling that mad smile of his and looking straight at him.
This was going to be bad.
Before he could react Loki grabbed him by the shirt, dragged him forwards, and did the absolute last thing Banner expected. The kiss was brutal, a tongue pushed roughly into his mouth and fingers twisted into his hair, dragging his head back. Even distracted by surprise he felt Loki slip off the desk onto his lap, one leg either side of him, and was dimly aware of the erection pressing into his belly.
“Wha- what are you doing?” he gasped, managing to briefly escape the god’s mouth.
Loki grinned savagely and started to kiss his neck, each one only just shy of a bite, punctuating the words: “I want to know how it feels when you start and he finishes.”
“What?” Toomanythoughts-toomanythoughts-toomanythoughts.
“Oh come now, you know your Hulk and I took great pleasure in each other.” He leaned forwards and nipped Bruce’s ear between his teeth. “The last time I was so well serviced it took a giant’s stallion. Your beast is bigger.”
Bruce felt something in his brain break from trying to process the concept of a Norse god with a size kink. Sensing his distraction, Loki slid a hand into his crotch and squeezed; it suddenly got even harder to think.
“Or perhaps your tastes depend on your mood?” He winked, squirming against Banner in a way that was just filthy. “What must I do to have my new friend come out to play? Threaten you? Threaten your little friends? An interesting foreplay tactic but one I’ll happily indulge.”
Finally, Bruce Banner found his tongue. “You enjoyed what happened? What he did to you?”
Loki almost seemed surprised by the question, he leaned in and nipped the same ear he’d abused before, whispering, “Oh, yes, I enjoyed it very much.”
He started to kiss Bruce’s neck again: surprisingly tender kisses interspersed with bites. Bruce found himself getting turned on, and it was wrong because this was Loki and he was a villain and a killer and also Thor’s baby brother and oh lord Thor would murder him when he found out, but then that famous silver tongue was whispering in his ear again: wicked, wicked whispers that made the green demon in his hind brain sit up expectantly and start making demands about wrapping a specific pair of long Jotun legs around his waist. There really was only one choice: he obeyed that voice and bolted as fast as he could considering the extra weight, all while trying to ignore Loki’s demented giggling.
Maybe they could make it to the containment cell in time.
Loki yawned sleepily and stretched like a cat, very content with himself. The wreckage around them was rather satisfying, adding a secondary layer of post-coital glow. Banner was still asleep next to him, one arm slung across his belly in an echo of his more interesting other half’s possessive nature towards his new mate. It was such a shame that the mortal had shed his giant form, Loki was in the mood for a lazy morning rematch; but perhaps he could rouse the beast again...
“I trust you have an explanation for this... interesting method of capture, Doctor Banner, but I would like to know why you felt the urge to wedge the cell door open,” Fury said from the other side of the cracked glass. Thor was staring, his mouth open. Stark appeared to be taking photos.
Loki grinned. Oh yes, that would do nicely.