Day 3 - Happy family

Shit, shit, shit!

She tricked you! Both of you!

Before you even had the chance to fully comprehend the extend of your situation, your sister already pushed herself away from the table, stood up and attempted to run - only to hear a metallic sound from below! A pair of handcuffs? Handcuffs around one of her ankles, keeping her secured to the chair?

Clack!

A second pair snaps in place around your own ankle, and you turn to see your father casually getting back up and returning to the living room to continue watching TV.

"No!" Gwen protested. "I gotta get to the bathroom! I have to throw up before that stuff actually gets into my bloodstream!" she shouts, panic and adrenaline clear in her voice. She knew the effects of the **** more than anyone else, considering she's the one who mixed it up and created it.

"Shhh, all you need to do is relax." Your mother believed firmly that it was for the best. Keeping the family peace. Seeing her daughter in distress for a few minutes was a fair exchange for a lifetime of seeing everyone happy.

You begin to realize just how screwed you are as you continue watching the sheer panic of your sister, and you attempt getting away yourself... but it was no good! The chairs were made of thick sturdy wood. As a guy, you could've lifted them with absolute ease. But as a girl? It's like they're made of dense stone or something!

No, no, no!

This can't be happening! "Don't do this!" you plead with her, but she shakes her head. Come on! ... but then again, maybe it wasn't all that bad. Sex was kind of fun after all. Maybe she was right? Maybe you shouldn't worry so much?

Gwen also ceased her frequent, intense struggling. She became more thoughtful and collected. For as long as humans existed, sex was kind of the only thing that always existed at the same time. Everybody did it. So why should it be a bad thing? If anything, using birth control was the evil thing! It's unnatural and vile!

Wait, no... or yes? Crap!

You're losing it!

Even shaking your head in an attempt to clear your mind didn't help. Sex IS natural! You're a woman now, and it's about time to behave like one.

Daddy knew there was little time remaining to make your transformation permanent. A bit of viagra helped to keep him hard for the rest of the day.
That pubescent vagina of yours was soon stuffed full of virile semen, and your pregnancy was confirmed in the morning. You were your father's fucktoy ever since.
It was thrilling and exciting to have finally found your true purpose in life!

Gwen eventually couldn't fight the overwhelming hormones anymore. Each and every morning she milked those heavy testicles of your brother until they were fully drained into her.
A year later, she was his girlfriend and pregnant with his second child. She quit studying and instead learned to cook and clean.
She couldn't be happier!