"Jesus Christ!" she gasped as she stared at my cock. I wasn't sure if it was the size making her gasp like that, or the fact that her boyfriend's son had just whipped out his dick in front of her.

"Told you it was big," Dad bragged.

"Even bigger than yours," I confidently said again, getting a rush of adrenaline at the reality of this beautiful girl staring at my cock with the awe girls usually reserved for the hot guys at my school.

I looked at Dad smugly, but he just gave me a nod... as if giving me silent permission to use his girlfriend. Feeling a confidence I...