I rubbed my cock up and down the length of her pussy teasing her clit with it, before I plunged it into her depths. We both screamed from the overload...of senses as I fucked her with long deep strokes. Her thighs came up and her toes curled as her body undulated in response to fucking her. We heard a groan, and startled we looked over our shoulders. There, watching us with her hand in her tennis skirt playing with herself was my Mom. She was leaning against the wall while she masturbated while. She said OK and we both hung up.I walked over, picked up the green towel and headed for Ariel's room.Without knocking I entered. Now that we were fucking each other there was no need to respect each others privacy. Ariel turned around and smiled. She only had on white bra and panties. She was standing in front of her closet looking for the right outfit. I walked in, closed the door and threw the towel on her bed."Our folks are out tonight. What time you coming home?"Ariel turned around and. I love you, and I will always respect your decision. I still don’t think what we did was wrong or if it were a sin at all, I would love to do it again and again. You are my mother but before that you are a woman too, who has some needs, and I don’t see any wrong in helping you in fulfilling your needs. However, I would respect your decision.”Mom looked at me gratefully, her eyes were still wet but she was not crying now. I was not feeling great. All my ideas, all plans for the day, were ruined. Then, blushing prettily, she took up my left hand from the table, and kissed it in the centre of the palm, and replaced it on the table. I was flattered and frightened at the same time. I had to remonstrate with her: ‘Miss Amelia, you must be more careful. If your Mama were to come in now, she could not but see that something was going on.’ To my shame, I was asking her to be discreet and, a little mendacious. I was not asking her not to take such liberties, because I simply could not bear to.