When she stuffs her hands in your pants

You yelp inside her mouth. Zoe's hand explores your sex with much gusto. Your legs twitch, your knees buckle. Quit trying, there's nothing you can do to close the void between your thighs.

Your sister steps up her teasing, as you feel a couple fingers sliding inside your vagina. Your high-pitched moans demonstrate how much of a little girl you are now. You feel her spreading your insides, your walls clenching her fingers in love. You're leaving quite a mess on the floor with your lovejuices.

"So how about that Lucas? You still think you can call yourself my brother?" You hear Zoe teasing you. "Is getting your pussy fingered better than sticking your dick inside one?"