You need it

You reach into the bag, pulling out the dildo and one of the small canisters.

"Umm..." Alex says, his eyes darting back and forth between the road and your pussy.

"Keep driving; I'll be quick!" you shoot back at him.

You fumble a bit trying to figure out how the cum goes in, eventually realizing it goes into the bulb attached to the dildo. You quickly dump the contents in before closing it back up.

"Don't get my car seat dirty!" Alex says, continuing to double-task with his eyes.

You don't say anything. You just line the dildo up with your pussy and push it into yourself. It felt great to be filled by the dildo once again. You push it in and out a few times, feeling yourself get wetter. The anticipation is wonderful. Only a dozen or so times later, you feel yourself getting close. You shove the dildo as deep as you can into yourself and squeeze the bulb.

Your legs start twitching. You start cumming, and black out.

A car honks as it passes. Alex swerves back into his own lane. You're pulled back into reality.

"Damn," Alex says, "that was HOT!"

Your breath is ragged and fast, but slowly returning to normal. Your heart is racing. You could get used to this. You might just be addicted to this. You spend the rest of the time on the ride resting, the dildo still embedded deep in your pussy.

When you get back to Alex's, he pulls into the garage and closes the garage door. You quickly hop out of the car, holding the dildo in place, hoping to keep the fake cum from escaping before you can get somewhere it won't make a mess. You run to the bathroom and squat on the toilet before pulling the dildo out. A stream of white goo runs out of you.

You clean yourself up and get your clothes in order before exiting the bathroom. You walk up the stairs to Alex's room, the dildo in hand. On his bed, you see the bag, but no sign of Alex. You look around his room, but still don't see him. You're about to call his name when you hear his voice from down the hall. "Score!"

"What?" you ask, returning to his bedroom door.

He comes out of his parents' room holding a box. "I found condoms!" He's grinning widely. His pants are on the ground before he's even back in his room. He pulls out a condom, tears the package open, and rolls it on.

He's kissing you shortly thereafter. You're on the bed. He's pulling your shorts down.

"Be careful." you say, no longer even questioning the idea of being fucked by your best friend.

He grunts his approval as he shoves his condom-clad dick into you. He fucks you only a minute or two before he pushes himself deep into you. "Fuuuuuck!" he groans. You feel his dick twitch.

"Pull out!" you say, alarmed. He either can't hear you or is ignoring you, because he continues to hold himself balls deep. You push on his pelvis, trying to push him out of you, but you realize that the damage may already be done. You stop struggling and realize your heart is beating hard -- your adrenaline is pumping, and it doesn't exactly feel bad.

When he finally pulls out, you see that the condom is intact. You're relieved. Maybe you could trust condoms after all.

You and Alex spend the rest of the day playing videogames, fucking, and getting stuffed with the squirting dildo. You had a near-constant stream of fake cum leaking from your pussy. When the canisters were all empty, you started filling it straight from the bottle of fake cum.

You eventually text your parents to tell them that you're spending the night at Alex's house, and Alex gets his parents to orders pizza for dinner so he can bring you a couple slices without them noticing.

You manage to hide in his room overnight without his parents noticing you were there, and as soon as they went off to work the next day, the two of you picked up where you left off. Alex always wore a condom, and the two of you were careful not to get any of his cum anywhere near your pussy. This continued through the rest of the day, and you eventually get him to take you home, where you sneak in without your family noticing.

You go to bed that night, happy to know that you outsmarted the person who had changed you into a woman. You'd had an amazing 2-day fuckfest with your best friend -- you might have some stuff to unpack in the coming days, but for now you just wanted to sleep. You throw off your clothes and climb into bed.

You wake up the next day to someone knocking at the door. Your mother calls through it, "Honey, are you ever going to wake up?" You pick up your phone, checking the time. It was almost 12:30.

"I'm getting u-" you start, but stop as soon as your own voice registers in your ears. It was quite feminine.

Unknown to you, as you slept last night, a swarm of sperm cells swam to meet the egg travelling down your fallopian tube.

They rushed toward it, surrounding it.

Eventually, one managed to get through its defenses, starting the unstoppable process of creating a living cell.

One of the canisters you'd used used contained something far more dangerous than white lube.

"Do you have a girl in there!?" your mother shouts, opening the door.

You're busy throwing off your blanket and sheets. You look down. You still have breasts, and they're on full display to your mom. She starts screaming at you.