Give her a wedgie

Before Caitlyn can say anything, you roughly hook your fingers and thumb through each leg of her pink underwear. Pinching the fabric together in your grip, you yank the front of her panties up as hard as you can, smirking as your sister gasps from the fabric digging into her privates. By the time you force the stretched pantie to just below her chest, the fabric covering her crotch had thinned to a finger’s width and was digging tightly into her pussy, revealing two thick pussy lips and small arrow of dark pubic hair pointing to her lower hole.

“Huh, never would have guessed you gave guys a roadmap Cait,” you tease, the words coming out of your mouth without thought. For emphasis, you use your other hand to flick the faint outline of her clit against the stretched panties, causing her to squeal.

For a second, the itching need in your hands is replaced by worry that your sister is about to fly into a full-on rage, but you soon realize you needn’t have worried.

“What the fuck John? Let go.” Your sister pants angrily, but her face is flushed bright red with embarrassment and instead of slapping you or screaming for help, she just wriggles her ass to try and relieve the pressure. Rather than helping though, it looks more like her efforts just wedge her underwear deeper into her pussy. “Please! It’s too tight.”