Cowgirl. Let her be in control a bit before you take over

"Ok, let me get a condom." you tell her, beyond the point of being ready to get your dick inside your cousin's tight, little pussy and start moving back towards your nightstand.

"Oh no David. I don't want anything between us for my first time. " she stops you before you can even get your hand on the drawer.

The two of you are so far into this and have done so much already that the idea of an accidental, incestual pregnancy with your little cousin doesn't even cross your mind and you don't even think about asking if she's on the pill. The only thing you can think about is getting inside her bareback and getting the full effect of her hot, virgin pussy clamping down around your dick. "If that's how you want it, that's fine with me. Why don't you start off on top." you suggest, moving to lie down on your back and knowing she'll have more control and can set the pace how she wants. You already know she masturbates, but you don't know if she's ever inserted more than just her fingers inside herself and she might not be used to something as big as you.

Lexi seems to be in agreement with that idea and straddles your lap then reaches down to grab hold of your shaft to line you up with her entrance. It takes quite a bit of your self control to stop yourself from thrusting up into her, but you let her take her time while she teases and rubs herself with the head of your cock against her opening until she decides she's ready. As she begins to lower herself onto you, Lexi closes her eyes and bites her bottom lip, the sensation of being filled up making her shiver with pleasure and she lets out a low moan as your cock begins to fill her void, inch by inch.

Lexi is tight, but her juices are freely flowing from everything the two of you have already done up to this point and your dick slides into her eager pussy easier than you thought it would. You both let out a low moan once you're fully inside then she stops for a moment, allowing herself to become accustomed to the feeling of your long, girthy dick completely filling and stretching her apart before slowly opening her eyes and looking down at you with a mix of pleasure and excitement in them. "This is finally happening, isn't it? I'm losing my virginity to you. You don't know how long I've fantasized about this David, and you feel even better than I imagined." she tells you as she begins subtly wiggling her hips on you.

You silently agree with Lexi, it does feel better than you imagined it would, and you have to again resist the urge to start slamming up into her. "It is happening, Lexi, and I want it to be good for your first time." you tell her, mustering every last bit of self control. "I'm gonna let you use me right now and let you figure out what works for you. Just listen to your body, try different things until you find what you like.”

Lexi smiles at you before placing her hands on your chest for support, then starts moving and grinding on your dick. It doesn't take her long to figure out what feels good, which is apparently the feeling of your dick sliding in and out of her dripping wet pussy as she bounces up and down on you. You move your hands down Lexi's waist and begin cupping her ass and guiding her movements as she moans in pleasure, your thick cock repeatedly rubbing and bumping into her g-spot each time she lowers herself back onto you.

Lexi soon starts moving faster and you're no longer able to stop yourself from matching her rhythm, thrusting your hips up to meet hers and stimulating even greater depths of her slick and sensitive tunnel. "Oh fuck David! That's even better! Don't stop!" she tells you breathlessly in response to your added participation. "You're sooo deep! I can feel my clit swelling up! Oh fuck, you're getting me close!" she informs you before she starts increasing her pace further and slamming herself down onto you. Lexi wasn't lying about being close, because before you know it, she lets out a squeal and throws her head back as her entire body shudders in orgasmic release, her hips continuing to buck while the walls of her pussy contract tightly around you. Her movements have become too frantic for you to match and you can only bridge yourself up to keep your dick buried inside her while you let her ride out the waves of her orgasm. As Lexi's movements eventually slow, you relax your hips back onto the bed and watch as her ragged breaths begin to even out and she comes back to her senses.

After another moment passes, Lexi opens her eyes, looks down at you, and smiles, pure bliss on her face. "Oh my god David, that was amazing! I've never cum that hard before! I think it makes it even hotter knowing that this isn't something we should be doing, don't you?" she asks you, biting her bottom lip while starting to rock her hips back and forth in a slow, sensual rhythm.

You can't argue with that statement at all. "I think you're right about that Lexi, but you telling me you were about to cum was pretty hot too. Well I'm not done yet." you tell her and start moving your hips as well, bringing her attention back to your hard cock still filling up her pussy. "Do you want to keep going like this or is there more you want to try?"

"Oh, there's a lot more I want to try. How much longer do you think you'll be able to last?" she asks you, eagerness in her voice.

"I guess that depends on what we're going to do, but I think we'll be able to try at least a couple more things." you tell her. You've had enough girls tell you that you last a long time in bed for you to believe they weren't just saying it to be nice, but sometimes things get so hot that blown your load faster than you'd like. "What did you have in mind next?" you ask her, curious as to how wild she's planning on making things.

"How bout you do me doggy style next." she suggests with a naughty twinkle in her eye.

The suggestion is a little more vanilla than you were hoping, but then you remind yourself that Lexi has told you she was a virgin (though you strongly suspect that statement is part of the role playing and not true) so just changing positions is probably exciting for her. Besides, you really don't mind being able to stare at her tight little ass some more and smile at her, telling her you'd love to fuck her from behind.