A last round of practice?

Upon returning to your bedroom, you can see that Dennis had made himself comfortable on your bed and had pushed the bed covers aside - he didn't even notice that you returned because he was reading one of your books. For the first time, you actually got a good look at his appendage. It looked... bloated. His girth was nearly as wide as your wrist! The thick veins that were adorning it had a light blueish color, and were leading up to a dark red, bulbous cockhead. With the morning erection he was rocking, you could also tell that when hard, the shaft was angled upwards instead of pointing straight ahead.

It was pretty fascinating to look at his rod, considering you didn't have much to compare it to. It was also impressive that he managed to fit that thing into you in the first place, considering how... petite and small your vagina looked in comparisson. Slightly more gross however was the fact that there were still somewhat fresh juices coating his meaty shaft, but given that they're just remnants of your own natural lube, you quickly disregard that. Couldn't be mad at him when it was your fault that his dick was wet, right?

You decide to join him on the bed, but he remains quiet while keeping busy with the book.You eventually grab a book yourself to catch up on some studying you still had to do anyway. The two of you spend a decent amount of time like that before you realize that both of you are still naked but not doing anything with it, which kind of defeated the purpose of having him here in the first place. It would make more sense to kick him out and have him returning sometime later in the evening, after you're done studying. However, as you look back over at his veiny baby stick, you remember how comforting it felt to have your vagina stuffed with his meat.

After a few more moments of contemplating your options here, you simply roll over onto your belly and reach out to poke Dennis. "Hey, don't forget why you're here. Alex would probably give me hell if I don't let you continue practicing," you suggest before reaching behind yourself and spreading the perky cheeks of your bum to reveal the tiny slit between your legs.

He didn't need to be told twice, as he immediately crawled over to your side of the bed, climbed on top of you, and alligned the mushroom tip of his appendage with your womanhood before pushing inside. You release a soft gasp, feeling your insides stretching to accomodate him once again, but by now you could clearly recognize every bit of his erection and knew what to expect. "Nnnh... sorry that it's so tight again," you apologize. "Just give it a couple thrusts, to loosen it up down there," you point out and he obliges quickly. He begins shoving his heavy crotch forward and slams his dick into you which makes you groan in response upon feeling his entire thing wedged into you. "Tad more gentle... you're gonna ruin the playground otherwise," you joke half-heartedly but the message seems to get through, as his following thrusts are a whole lot more reasonable. Even the bed begins creaking in a rhythmical, almost soothing fashion.

"I'm gonna cum again," he warns you after a few more bumps, which comes entirely unexpected. He's gonna cum? Like, while inside you? Your first instinct would be to kick him off and throw him out of the house, but on second thought, your sister did advice you to try and enjoy sex a little more. To be less of a drama queen.

"I guess it's fine this time... just do it, I'll get it out somehow afterwards. But it's a special exception," you offer and your heart suddenly begins beating twice as fast. To your knowledge, it would be the first time that you get semen into your perfect little snatch. Is that really a risk you were willing to take? Was it worth the trouble? You could also just offer him to pull out and you'd finish him with your hands - maybe even your mouth if he insists. The alternative would be that for the next few days, you would know that your lady bits were painted white on the inside. "Hey, on second thought, how about-"

"God that was amazing," he blurted out before giving your bum a soft smack, and then lowering more of his weight on top of your back until you felt yourself firmly pressed against the bed sheets, your legs snugly closed, and his appendage still held in a tight embrace by your vag. "Your pussy is squeezing out every last drop," he chuckled before giving you another lazy thrust.

Huh? That was it? You carefully reach down and tenderly grasp his ball sack that was still pushed against your labia, and you could feel the subtle contractions while he dumped more of his sperm into you, completely bareback and with nothing to serve as barrier. "Huh," you mumble thoughtfully, surprised that it didn't feel more... special? Impactful? Maybe even painful, who knows. "That wasn't so bad," you say to yourself, but Dennis laughs proudly under the belief that it was a compliment aimed at him. As you slide your fingers slightly to the side, you touch your sore pussy lips that were still wrapped around his manhood. You could almost imagine the way your previously so untouched and pure vagina, was currently **** to swallow every gooey spurt of his seed.

With another sigh he rolled off you, his dick wetly sliding out of your freshly creampied hole and reminding you to move a hand down to cup your pussy before any fluids manage to seep out again. For the second time today, you excuse yourself and waddle to the bathroom to crouch over the toilet seat and let the mixture of goo leak out of you. You're even pleasantly surprised that cum doesn't look particularly disgusting, in fact, it looks much like the stuff that already leaked out of you the last few times. Maybe it had been his cum back then, too... but did it really matter? With a shrug you decide that no, it didn't matter. As you grab a piece of toilet paper to wipe away the last traces of his sticky gift, you're still left pretty surprised. Considering how potentially risky the stuff was, it looked remarkably similiar to your own juices after it had a chance to liquefy. Still, were you really willing to take the chance of getting knocked up?

You quietly leave the room, only to hear Gwen's door opening and you turn around with a surprised expression. "What's up this time?" you ask her and she silently gestures for you to turn away while she's approaching. You do, only to feel a short prick on your left bum cheek. "Ouch!" Rubbing your delicate skin, you turn around to face her again. "The hell was that?"

"Just a vitamin shot, don't want you to get sick with all that walking around while naked," she replies with a wide grin before returning to her room.

In the meantime, you return to Dennis to break the news to him that you're not willing to continue taking the risk of getting pregnant.

Back in her own room, Gwen put the now empty syringe back on her desk. She had a pretty pleased smile after hearing the moans and gasps from your room just a few minutes ago. Still, to try and speed up the natural progression of things, she mixed up a potent little cocktail. If things went according to plan, it should quickly awaken even a teenager's biological clock. It usually doesn't come up for women until they're in their late thirties and still childless, but why wait that long?

Of course it didn't enhance fertility in any way, but it didn't need to. Another pleasant side effect is that sex will also release a whole lot more oxytocin, the lovely bonding hormone responsible for getting us so emotionally attached to the person we have sex with. Gwen could barely wait - her little sister and Alex were making a cute couple, maybe this was just the thing their relationship needed to take the next step!