Erin was riding my dick and I got the random idea to have her lay back on my chest so I could take over. We've done that a few times before but this time I just happen to notice how far back her legs are going. I hook her behind the knees and reach my hands behind her head and start using her real good and hard. Being the naughty little fuck doll that she is, she gets super turned on and let's me go ham.