You and your sister slowly wake up from a Friday afternoon nap, when she notices something... big and hard in between her legs. It's your cock! But it's not attached to you, it's attached to her! She makes you show her what's in your pants, and sure enough, your cock has been swapped out and now you have your sister's very own pussy between your legs! You have always badgered her to touch your cock, to suck it, and to fuck, but now she's got the upper hand! She laughs at your misfortune, and makes fun of how you used to beg for it. Now she tells you that she wants you to suck her cock. She isn't cruel, but gentle and teasing the whole time. She makes you suck it, then she tells you that she knows your boy pussy is wet, and she wants to fuck it! You climb on for a ride and she humps into your pussy while telling you how she's going to fill it with her cum.