I catch you (my brother) creeping on me while I touch myself. Shocked and grossed out, I accuse you of being a pervert. You tell me that wtching your sister turns you on and admit to fantasizing about me while you jerk yourself off. "I guess it wouldn't hurt to let you watch while I finish since you've already been watching me this whole time." I agree to let you jerk off while I touch myself, and get naked for you while I tell you to stroke for me. "We're only doing this ONE TIME! After this we're never talking about it again, okay?" You pull out your cock to stroke and I confess it's kinda hot to have my brother watching me. I tell you it would be easier if I just stroked your cock for you, but I don't have the self control to stop there... soon I'm licking my very own brother's cock and telling you how good it would feel inside of my pussy. There's no way you're going to refuse that, so you lay back while you watch your sister climb on top of you and slip your cock into her tight wet pussy. There's no going back now and I moan as I feel your hard cock stretching me open. I tell you how naughty and bad it is to fuck your sister and I beg you to fill me up with your cum.