"I know," he said. "She just kept going, massaging my dick and telling me how slutty she would behave if I didn't fuck her again right then. She got me hard again but I was still not reciprocating, so she knelt down, pulled my boxers off, and started blowing me. She stopped every other moment to say something else filthy to me, like 'How does your dick look in your sister's mouth?' Then she pulled her shirt and bra off and wrapped her big boobs around my cock. She rubbed it up and down her hot, soft cleavage, saying shit like 'You better not shoot your hot load all over...