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English
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Published:
2026-03-17
Updated:
2026-04-21
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2,781
Chapters:
2/?
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A Line Crossed

Summary:

Adrien catches Nathalie in private moment. It soon changes everything they thought about their relationship.

Notes:

I hope you enjoy this one I've been thinking of writing for a while now. As always leave any comments, questions and suggestions in the comment section.

Chapter Text

Adrien hadn't meant to watch her, he never meant to invade her privacy like that. As a young sixteen year old male it was only natural for him to be curious when he heard the sounds coming from her room. At first the sounds he was hearing sounded like groans of pain but as he approached the door to Nathalie's room he stopped and held his breath when he realized what he was really listening to were moans.

Adrien stepped as silently as he could to get close to the door and to peek inside. His heart was hammering in his chest, he was finally close enough to peer in and see the scene before him. It froze him solid when his brain quickly processed what he was looking at. There lying on the bed naked was Nathalie the woman that had stepped up to take a distant and professional role as a caregiver in his life since his mother passed away. All the while maintaining herself as his father's assistant, she had helped raise him into the young man he was today. Now after his was father gone she softened her role and their relationship had developed into more of a traditional mother and son role. Even though legally Adrien was the head of the Agreste estate, Nathalie was in charge of taking care of the home as well as being his assistant. Adrien had a board of directors running after all the actual Agreste company not that he cared much for it at all these past couple years. These unconscious thoughts drifted through his mind as his attention was snapped back into reality as Nathalie let out a louder moan and her hips bucked slightly.

He could almost see it all, he saw how flushed her skin was around neck and face. He could see the peaks of her chest standing proudly as she kneaded and massaged her right breast with her left hand. Further down he could see where her right hand was hidden by her milky white thighs between her legs. He had no idea how she was touching her herself, was she rubbing the outside of her lips or was she fingering herself? If so how many fingers was she using and what did hers look like?

These thoughts swirled around in Adrien's mind as his cock grew stiff in his pajama shorts he was wearing he couldn't help but lazily allow his own hand to drift down and rub himself through his clothing. His every muscle was coiled and ready to retreat at the slightest indication of Nathalie noticing something may be amiss. But it didn't happen for several more minutes the moans and movements continued as the wet sound emanating from between her legs grew louder. Adrien now had his shorts and boxers pulled down just enough to allow his cock to pop out and he was stroking his exposed shaft with more intent than he ever had before. His precum had helped him lubricate his length as he watched Nathalie reach her climax.

Her left hand covered her mouth to muffle herself as her body was wracked with spasms and shakes. The pleasure spread like wildfire from her core all the way through her body leaving her as a panting and sweaty mess, especially between her legs.

Adrien meanwhile had to stop himself from cumming and quickly and quietly retreated back to his room where he proceeded to replay the memory while his hand furiously stroked up and down his length. It took only a moment or two and Adrien groaned as his muscles tightened and his cock throbbed with pleasure. He couldn't remember the last time he had an orgasm that powerful before and it was all because of a woman he considered family. He could feel his release all over his hand and around his crotch. He wiped his hand on his shirt that he knew he had just gotten cum on so it needed to be washed anyway and began to clean himself up and change into new sleepwear.

"What the hell is wrong with me?" Adrien asked out loud. He felt deep shame for what he had just done and what he had thought of someone that was a member of his family.

'I can't believe I just did that...she's like a mother and a friend to me' He thought to himself. The idea that not only would he invade Nathalie's privacy but to stand there and watch it until the end. A moment that was supposed to be a private intimate moment and he had the audacity to not only watch but to stroke himself to it. To her, to her beautiful body. Her supple yet firm looking breasts. To her long and well toned legs, to imagining what lays in between her legs...does she have pubic hair and what does she smell like? What does she taste like?

"No" Adrien commanded himself.

Adrien tried to fight the questions and images in his minds eye but he couldn't win. He went to sleep that night trying not to imagine what she looked like standing naked fully before him.

The next couple of weeks went on as they usually did except Adrien began to notice more small details about Nathalie he had overlooked previously. The way she walked with confidence and grace. The way her clothing fit her just right, not in any way that would purposely draw attention to herself in a sexual manner. More that it all just accentuated her natural beauty. Although Adrien can't help but notice how amazing her ass looks every time she bends over. He noticed how kind and beautiful she looked when she smiled and laughed or the way her hugs felt so warm and loving. He subconsciously began to get closer to her to see all the little details on her face and in the way the light reflected in her light blue eyes. He began to notice she tended to use lavender scents when she washed herself along with more fruity and sweet smells as well. This of course led him to wonder if she shaved if the bathroom and more specifically what did she shave? Across those couple weeks at least once or twice a day he would have to masturbate to the thought of her whether from his own imagination or with the help of porn on the internet. Of course nothing could have prepared him for the treasure he was about to stumble upon.

He had been looking for Nathalie in the house without realizing she had already texted him to tell him she had to meet with some of the executives for the Agreste brand that day for a lunch meeting. So Adrien had wandered over to her room and waited at the door silently hoping to maybe catch her in the act once more but he heard nothing so he knocked on the door and announced himself. He heard no response so he opened the door and when he approached the bed he saw a sea foam green pair of underwear.

"Holy shit.." He quickly noticed that her bathroom door was wide open with the lights off so he knew she must not be home.

He quickly grabbed the underwear and ran back to his room and jumped on his bed. He quickly pull his pants off and released his cock as he held the panties in his hand. They felt like soft delicate cotton in his hands and as he held them close to his his nose to get his first whiff of an actual pussy, his cock began to harden. He could smell the soft, almost warm musk scent of her crotch and it was like a drug to him. Adrien quickly began to touch himself as he then dared to stick his tongue out and taste right where her crotch had been. The gentle cotton had a faint tang to it he realized as his tongue moved it's way around the fabric. He lost complete awareness as to the passage of time and the house around him. Adrien didn't hear the front door close, he didn't hear the footsteps getting closer. But as he climaxed into the air with sea foam green panties held up to his face he heard her yell at him. It made his blood run cold.

"Adrien Agreste! What are you doing!?" Nathalie cried out.