Making a mess on my stepsister's prom dress I could hardly wait to wrap my hand around my stepbrothers and stroke him. What guy can resist a hand job from a pretty young blonde like me? wanted him to feel as good as he made me feel tonight. I was surprised by how big his dick is. It felt good in my grip. I've heard him beating his meat alone in his room before. If I had known what a nice sized dick he has I would have gotten it in my hands long before tonight. It only felt a little weird but while I was stroking him I focused more on giving him pleasure than the fact he is my stepbrother who I've practically spent all my growing years with. None of that seemed to matter because he definitely was rock hard for me right now. I cranked his cock with a firm grip, up and down, up and down. He started to moan heavier and his breathing was getting faster so I knew he was going to give me a great geyser of his goo. I asked him to spew it on my prom dress.