***The condom tf***

Fuck. I'm going to my girlfriend, but can't find them.
"Sis! Sis? You gotta help me. I can't find my condoms."
She's angry of course. "Not my fault you didn't buy new ones." But my puppy eyes win. "OK. I'll help you out. One last time..."
Watching her change is fascinating. She drops all her clothes but her panties blushing. Then she becomes translucent, her legs shrink, and she grows flat inside her panties. her torso flattens. She gets smaller. I catch her as she falls to the ground. Her panties are now a plastic wrapper, she's the condom inside.

In Lydias bedroom, I strip, rip open my sis' package and wrap her over me. Knowing its her is so hot!. I take Lydia her rough, both holes. Almost worried sis might rip, but she holds. I dump the used up condom in the trash, then get clean and cuddle with my girlfriend.
Just my luck. I oversleep and Lydia's already emptied the trash. Eventually I find my sis in the dumpster and bring her home for a shower. After cleaning, I fill her with water and play with her.

Holy fuck, its leaking! What if I got Lydia pregnant?!?