My sister recently told me that she has been having sexual encounters with her son. She denies having had sex with him, but described in detail everything else they had done. I couldn't keep this information to myself and so I went to tell my son. We both agreed about how strange and gross it was... After thinking about it, I realized, I was actually really turned on. The though of sucking my sons dick, having him caress my body, and especially eat my pussy. I change into something sexy, and go back into my son's room. After a little bit of apprehension, he is quick to do exactly what I want. First I coax him into getting hard by touching him, have him suck my nipples, and then I get a taste of that perfect cock I made. Eventually I tell him that I want to cum all over his face. I proceed to ride his face, so he can taste the pussy he came out of, until I cum ALL OVER HIM.