In a chasity cage with a pregnant wife.

She woke up, and demanded kisses. I had to obey.

I noticed i was in a chastity cage that seemed a size too small, that was locked. My swollen blue and red testicles bulging out. They were much larger than normal.

My futanari younger step-sister was always a sadist at heart and my older biological sister always took her side. Now my wife was on their side. I'd be castrated completely in no time.

"Aww Theo, look at how cute your penis looks in that tiny cage. I can't believe it fits in something so small." Elizabeth said. "I'm going to try to fit it all in my mouth, balls and all."

And she did, to much discomfort to me. The pain caused me to orgasm, shooting clear fluids into my wife's mouth, she spat it out, to see.

"It has no white spots at all now, baby. What weak balls. They're never spit cum out like what's in my pussy now, huh?" Ellie said, teasing me." I wonder if you can even get hard, with busted-misshapen balls, and cumming while flaccid."

Later that night she exits the bathroom, jumping for joy, with a pregnancy test.

She was finally pregnant.

We had to move into a larger house that was almost like a mansion, to have enough rooms for all the children.

3 Years later.

My wife has had 3 children, two are futanari twins, and one is a girl.

My sister Sarah now has 6 children, 3 futanari, 2 girls, and 1 boy.

I've been getting locked into a cage and let out once a week during Erin's breeding ritual, where she uses lets me out to help stimulate Sarah and my wife Elizabeth, as she's fucking them both.