Your little stepsis just turned 18..is it a coincidence she caught her big stepbro who's home from college peeking in on her while she took a shower? I think not. Lucky for you, she thinks you're sexy, and she knows the feeling's mutual. Since you got to see her naked, it's only fair she gets to see you, right? She's a mischief maker, and decides she wants to have some fun with you. She'll tease you endlessly and talk dirty to you while you stroke your cock for her, and even give you a cum countdown. Maybe next time, you'll get to go further...