He's not going to outsmart you. Tell him you are experienced

If you tell him that you're inexperienced, there's still a chance that he will want to teach you all about how to get laid -- just to have a shot at impregnating that little teenage womb of yours. All he has to do is giving his dick a chance to spit a few loads of sperm into your snatch, something you sure as hell won't allow to happen.

However if you tell him that you already experimented with boys, he's much more likely to lose interest in you and your teeny pussy. After all, who would want sloppy seconds? He doesn't have to know that you're still a precious little virgin. Just tell him the opposite of what he wants to hear and he will change his mind and go to sleep.

"Of course I had sex before, duh," you begin to respond. Considering your situation, it was tough to act confident but you still somewhat manage to pull it off convincingly. At least now he's going to back up and let you go back to sleep, giving you a chance to return back to your normal body instead of being stuck in the body of a petite chick. Having a twat gave you nothing but trouble so far. It's like people stopped caring about your personality, and only cared about taking you for a ride! Your father was of course no different, something you quickly learn.

"Really? Then we can drop the whole act and get right down to business, yeah? I'm so glad you're not some annoying virgin. I always need an orgasm before bed, just helps me sleep. We are both adults, right? Let's get to it!" He was suddenly even more full of enthusiasm, no doubt he had no interest in providing a girl with ANY pleasure! And now that you admitted to having had sex before, he no longer had to fake an interest in making your first time special or pleasurable! What the hell! Both him and you are well aware of how that tiny slit between your legs was the easiest, quickest way for a guy to achieve a climax. It was biologically designed to help boys cum quickly, that was literally its one and only purpose! You're gonna have to act quickly if you want to fish that idea back out of his mind!

"Naa... I'm kind of tired." You yawn to underline your point and finally remember to take your hand off his chubby appendage. In response to your soft touch, it had grown to full size! Veins adorned its entire surface and it was standing rock-solid. Any girl who has to take that thing inside her lady bits can kiss her womanly tightness goodbye, his tool was a massive cherry-popper! It's almost like nature designed his dick to be a cruel joke, stretch a woman beyond her limits to prepare her for child-birth. Nope! Thank you, nope!

"That's fine, just remember to be quiet so we don't wake up Gwen. Unless you think it would be funny, you know, making her watch how her best friend takes a creampie," he chuckles as he in one skilled move hooked his arms underneath your knees, lifted your feet up and onto his shoulders, and climbed on top of you. He had you mounted in less than a second or two! It was an incredibly bad moment to be left speechless, since within another second, he easily lined his dick up with the sloppy entrance into your body and pushed right on in. Squelch! The slippery lips of your cunt opened wide to swallow every delicate inch of your own father's manhood. He was blissfully unaware that he just speared into another family member, his 'temporary' daughter.

"Ooofh," you groan bitterly, suddenly getting stretched apart mercilessly by the sudden presence of his cock! This... wasn't at all what you had planned! You didn't even give him a signal that you are okay with this! Just because you told him you're not a virgin, it doesn't mean that ANYONE can just enter your twat like that! So this is what it's like to have intercourse as a chick... "Ahnnn!" He gave you another unannounced lunge forward, and the bloated mushroom tip of his penis sunk in deep enough to give your cervix an affectionate kiss. Those two soft parts squished together messily, and for a brief moment, his urethra was perfectly lined up with the entrance into your womb. A squirt of pre-cum served as undesired housewarming gift for your womb, tainting the very core of your body. You're lucky there was no sperm in the mix...

"Jesus, Sarah, what kinda pencil dicks do you usually take if you are still THIS tight? You are like a little girl down there," he whispered into your ear, a statement that made you feel incredibly awkward and uncomfortable. It doesn't help that you hadn't even thought of that, of course other girls fool around with dildos all day, they're bound to be a whole lot more skilled at taking a fully adult-sized appendage into their cunts! You on the other can barely manage to avoid struggling and squirming in response to this intense discomfort of being stuffed full.

"I.. I didn't even agree to having sex!" you quietly point out with your feet dangling in the air, barely supported by your daddy's broad shoulders. You were also growing vaguely aware of the pungent scent of his manhood, a vague lingering smell of old cum and unfamiliar pussy juices -- it's entirely possible that he fucked your mother not long ago, and now their dried fluids were rubbing off on the insides of your vagina! So friggin' gross! Having sex bareback has got to be one of the most disgusting things imaginable! The vile mixture of your mother's pussy-lube, and his old cum, was rapidly mingling with your own juices! "It's... uh... a bad time..." you were mumbling between each thrust. It's surprisingly difficult to talk while getting the insides of your cunt polished with daddy's fuck-stick. "It's a bad time for intercourse... I'm uh... middle of my cycle... I forgot my diaphragm at home..."

His dick immediately throbbed against the naked, unprotected embrace of your flesh. A healthy squirt of pre-cum followed, and your vaginal lubrication mixed with his excited deposit before you even comprehend what's going on. He REALLY liked the idea of giving your high school belly a nice big baby bump.

"Slow down big boy." Giving him such a condescending nickname made you feel slightly better about yourself. With your slender hand you reach down to your battered pussy and grab the base of his dick to prevent him from making the situation any worse. "We will just have to do this another day." It's unbelievable how mature you suddenly manage to sound, but it might also be the only reason why you didn't just receive your very first proud insemination. If you gave the choice to him, he would simply keep going for sure. Lord knows, your womb would love nothing more than to swallow a healthy batch of your dad's wiggly sperms. Your loins are primed and ready to go for a session of babymakin'.

"That's boring, are you sure? I'll just finish myself off then." He reluctantly withdrew and the thick aroma of your cunt juices wafted up to fill the small tent. Fortunately Gwen wasn't awake to take notice. "Or better yet, let me finish on your tits," he suggested as he crawled up to your stomach and began stroking the fat girth of his erection. You stare at it in disbelief, it's unreal to think that sausage had been buried inside your body! That twat between your legs is thoroughly defiled now, the sooner you can get rid of that body part the better... hell, you don't even feel tight anymore? Is this what they mean with getting 'turned into a woman'? Whatever, you somehow managed to turn the situation back around. Everything is good. You crawl back a bit to give your dad a better angle to cum on your tits, but accidentally bump against Gwen's backpack...