Taboo Mother Face Sitting

I was so horny thinking about my son and I was masturbating while fantasizing about fucking his face. Suddenly my son comes in and has overheard me and says he is totally into it! I tell him that we cannot – it is incestuous. He says he wants me to sit on his face – how can I resist! I let him rub my pussy and I get so turned on that I cannot help myself but to climb on top and ride him until I come over and over telling him how much I love it!