Go with the flow

He was a whole lot harder than before, so whatever happened, it must've been good for him. You keep your grip on the base of his shaft and keep rubbing his cockhead up and down the length of your damp slit, teasing his cock. "So, what do you think? Really makes ya want to have a girlfriend, doesn't it?" you joke, but he nods eagerly. "You can be my girlfriend."

"Huh, no..." You're tempted to point out to him that you're only doing this because he intended to **** you, but that would be a little harsh and may risk pissing him off instead. "Hey, can I put it in again for a moment?" he asks coyly, and you reluctantly agree to it. Your slippery pussy lips open up easy enough, and you feel yourself stretching slightly to accommodate the bulky crown of his cock. You don't even notice that he lowers a hand underneath the bed covers, and began stroking the base of his erection...

"So uhmm..." It was difficult to speak or think clearly with that awkward sensation of feeling something inside your body. "What uhmm... are you going to tell mom and dad?"

"I dunno... how about... I'll just tell them that you are my girlfriend. Makes it easy, for both of us..." Somehow, you really didn't like the idea. He wasn't attractive, you definitely weren't into guys, and there clearly was the risk that your parents would expect the two of you to do stuff that boyfriends and girlfriends do together. And given that both of you were young teenagers, that would likely include fucking like rabbits. "I'm just saying... it's a whole lot more believable than having a classmate staying over for a couple days..." he points out, and it was frighteningly convincing. "Yeah, I guess you've got a point."

You begin noticing that his penis was shrinking again, applying less pressure to the insides of your pussy. "What's wrong, losing the mood?"

"Uhh... y-yeah that's it. Must be all the talking." He carefully began withdrawing, and the puffy lips of your womanhood closed immediately after he slipped out.

"So what now?" While waiting for his answer, you get off the bed and gather your boxer shorts off the ground and put them back on. Feels a little strange, each time you move your legs, it's like you can feel something gooey swirling around in your vag and trying to settle. Must be a side effect of getting turned on, how do chicks even deal with all these awkward sensations? Genitals that are designed to get wet on the inside instead of just... you know... working.

Both you and your brother get startled for a moment as the door downstairs audibly opens and shuts. Crap! You hoped that you had a couple more hours before your parents returned. That could've been enough time to come up with a better cover story.