I was masturbating on my step-brothers computer. I didn't realize he was home and didn't notice him jacking off right next to me since I had headphones on. I started to cum and then noticed his dick practically slapping on my face! I was so horny still that as soon as I got over the initial shock, I deepthroated him and sat on his face. He fucked me doggystyle and filled me up with such a HUGE nut.