Stepmom masturbate front of his stepson when he was also masturbate in the bathroom

My stepson has just turned young. I know he steals my panties and masturbates. One day I also saw his dick, ever since I saw his dick, I have had nights. Today I felt that he was masturbating again in the bathroom. I opened his bathroom door and saw that he was really masturbating, I got horny after seeing his big dick, and I myself stood near the door and started fingering my pussy, suddenly my stepson saw me and I too felt I told her that I wanted to have sex with him, he was also very horny, so without wasting any time we both started having sex. I never knew I would enjoy fucking my stepson so much. My stepson gave me an orgasm by lifting my legs and doing a horse pose.