Horny Stepmom got sneaky fucked by her step son from behind while she was cuddling her husband

My step-father and I were playing on the computer when my step-mother came in to see what we were doing. Her ass in legging shorts got me so turned on that I came up from behind, took out my boner and put it in full. At this time, she hugged her husband and talked to him. Sorry step-dad, I want to fuck our stepmother too!