C'mon! You knew where this thread was heading! Of course you peak in!

There's no way you're going to pass up this opportunity, and with this being your room, you know exactly how to open the door without it making a noise, and the carnal side of your brain has made the decision to do just that. Inch by inch, you slowly open the door, listening for any change in the noises coming from Lexi, indicating she's noticing the door, but the only change is an increase in the volume of her moaning accompanied by a wet, squishing noise. Feeling your dick stiffen in your shorts, you resist the urge to adjust yourself and bring your eye closer to the newly formed crack in the door until it's large enough for you to see through, and when it is, the site is even better than what you had hoped for.

Lexi is on your bed, lying on her stomach with her feet directed towards the door, wearing nothing but a black thong. She's got herself propped onto one elbow with her legs spread wide and has pushed the thong to the side so that she can more easily reach back and work two fingers in and out of her slick gash. Her positioning is also giving you a glimpse of one of her tits and you can see the nipple is puffy with arousal, and though her head is turned towards the door, her eyes are closed shut with her obviously lost in the moment.

Keeping one hand on the door knob to ensure the door doesn't move, you reach down with the other and begin fondling your rapidly hardening member through your shorts as her movements speed up. "Mmf! Mmf! Mmf!" you hear escape her lips as she continues finger-fucking herself on your bed, less than 10 feet from where you're standing. The site is quite possibly the most erotic thing you've ever seen, live, with your own two eyes. Never had you witnessed someone so obviously lost in pleasuring themselves, masturbating with the uninhibited enthusiasm that can only occur when you think you're alone. Combine that with the taboo fact that this is your hot, barely legal, cousin that you're watching and you realize your dick is probably the hardest it's ever been.

It seems like Lexi might have been going at it for a while before you caught her because in another moment, her hand starts moving faster with her hips rocking to match the rhythm, her breathing becomes shallow, and her whimpering turns to moaning that she seems to be trying to control by keeping her lips pressed together. Suddenly she lets out yelp that she can't contain then buries her face into your mattress to muffle the additional cries of pleasure, as she brings herself to orgasm, continuing to work her fingers in and out of her steamy twat as her body shakes uncontrollably.

"Holy shit." is all you can say as you slowly pull the door closed, figuring you better do so while she is lying there recovering. If you hadn't been thinking about doing nasty things to your cousin before, you sure as hell were now, and you quickly make your way to the bathroom, locking the door behind you and dropping your shorts to the floor as soon as you get there. Your hand quickly finds your cock, and you start yanking on your rock hard member, eyes closed shut while you picture Lexi's perfect, tight, teen-aged body writhing around on your bed. Unable to control yourself, your hand flies over your cock, not caring about making this last, only about cumming while the image of your cousin is still fresh in your mind.

It's only a matter of seconds before you feel your balls tighten, so you reach for some nearby tissues with your free hand and quickly bring the crumpled up wad to the head of your cock. Just as you manage to do so, the first blast erupts from your dick and you have to stifle a groan as the sensation is strong enough to make your knees buckle. Continuing your frantic pace, you keep pumping more and more of your seed into the tissues, all the while fantasizing that you were depositing it into your cousin's tight, 18-year old pussy instead. Eventually, your contractions slow and you milk the last drop to the tip before wiping it off onto the cum-soaked tissues, then flush the evidence down the toilet.

Slipping your shorts back on, you then turn on the faucet and wash your hands, to make it seem like you were actually using the bathroom for it's intended purpose, then exit the bathroom.

This time, there's not a sound to be heard, and you shuffle back to the TV room in a daze. Your body turns the TV back on under some sort of autopilot when you get there, but you don't register a single thing on the screen, and instead, find yourself rubbing your junk through your shorts as you continue fantasizing about your cousin and the things you saw her doing to herself, as well as the things you'd like to do to her.

Eventually it dawns on you that there's no way you'll be able to concentrate on the show that's on, so you simply switch over to live TV and throw on some sporting event that's being televised that you really don't care much about and eventually nod off.

You aren't sure how long you napped for, but the sound of the bathroom door opening and closing, followed by the toilet flushing, is enough to stir you from your slumber. Looking down the hall, you see Lexi exit the bathroom a few moments later, rubbing her eyes like she just woke up from a nap, wearing sweatpants and a big, baggy sweatshirt that, thankfully, hides her body, and your foggy brain starts to question if what you saw was real or if it was a dream.

"Hey." she says groggily when she sees you lounging on the couch, interrupting your thoughts, then walks over and flops down next to you. "Your bed is really comfortable. That nap is just what I needed." she then tells you, stretching out her arms overhead while letting out a groan.

"I'm glad you liked it." you say, bringing your thoughts back to the present. "So do you still want to go out or are you too comfortable now and just want to stay in? I could order in some food for us." you suggest.