I went to my friend’s house to try on lingerie and get her opinion of it before I wore it for my boyfriend. On my way to the bathroom to look in the mirror, I realize her brother is home and was just spying on us and watching me change!! I threaten to tell his sister and he begs me not to. I tell him to move his pillow and I realize he was jerking off!! I call him all sorts of names while I’m still in shock! He’s like a little brother to me!! He asks me not to tell his sister but I tell him I need something in return. I tell him I want to watch what he’s doing (I’ve never seen someone do that before and I’m intrigued). I have to boss him around a bit but I could tell he likes it and being called a perv. He finally takes it out and jerks it for me. It starts to turn me on because his cock is so much bigger than I expected. I start to play with my tits and instruct him to keep going as they become more and more erect. I then ask if he wants to suck my titties. He says yes to I shove them in his face and shake them while he sucks each one. I ask him to cum on them but he insists on sucking them for longer. Finally, I climb on the bed and and grind my pussy while I show him my ass. I see he really likes that and suggest he cums on my ass soon before his sister comes looking for me. I start to bounce and shake my booty and that puts him over the top. He explodes on my ass RIGHT before my friend comes calling for me. I’m so glad she didn’t catch us! That was so hot!