Having been shrunken down by your sister and mom, you scurry away and hide under your sister’s bed. She walks into her room and starts looking around for you. She spots your shoe sticking out from under the blanket overhanging her bed, and crouches down to remove the blanket. She laughs at you for picking such a terrible place to hide. She says that you’re not only small, but super dumb. She talks about how she couldn’t believe how much giantess porn she found on your computer when she went to use it. After telling mom about it, she says the two of them decided that you need to be exterminated for being such a pervy little creep. Your sister says that she wants to have some fun with you first before she crushes you.
She thinks out loud about the irony of the situation. You are finally living your fantasy: you’re tiny looking up at a giant woman. But, instead of some random hot babe, you’re looking up at your sister. She decides that she thinks it would be fun to fuck with you a bit. She tells you that you’re going to fulfill this fantasy of yours and jerk off. You try to resist but she starts to tease you. She lifts up her skirt showing you her panties and turns so you can see her big ass. She bends forward and pulls down her shirt so you can look at her massive tits. Soon you are stroking you dick hard while she jiggles her ass. Your sister tells you to cum, and as much as you try to hold back, you cum hard. She then laughs about how much fun it was to ruin your fantasy for you.