My Surprise

I'm Alan 24 live at home with my parents, sister and grandma Alice 61 widow father's mother. I go to the local university and work several jobs to get by, I got a large tip off an older couple as they were lost and I took the time to show them where they were and how to get to where they wanted to go. Tips are my major source of income, I was fairly flush cash wise for a change. I don't get much sex from girls I date and usually masturbate myself. I've heard of sensual massage places where a woman will massage you while naked and also jerk you off. I looked up such sites on my laptop and found there were quite a few. Mostly younger women and some mature sites, I also knew from gossip around the university of female students selling themselves to earn money. I didn't want to get a massage and find it was with a student from my university. So I chose a mature site and made a booking, on arrival at the place I was shown into a room told to undress and lay on the table and that the lady would be in shortly. I did as told and the lady came soft spoken and started massaging my back, I could see thru the hole my head was over she hadn't any clothes on. Then told turn over, I was shocked to find that the woman was Alice my grandmother and likewise she was shocked to see it was me. She recovered first and told me not to tell my father or mother, I nodded and she finished the massage and masturbated me as well. Several days later with my parents and sister all out, we had time to talk. Alice told me it was the only work she could get that paid good and asked why I wanted a mature woman to masturbate me instead of a younger woman. I told of how students from the university were working to make money and how I was worried I might run into one of them. She smiled and said they probably wouldn't have said anything as they wouldn't want others knowing of their work either. I asked Alice when she was working again and she said Monday, do you want another massage. I nodded and she okay I give you one for free and led me to her room. I laid face down on her bed and she gave the massage and instead of masturbating me, mounted me and rode me until I came inside her. I was shocked at first, but really enjoyed the fuck. She told me she couldn't fuck the clients at the parlor and she had to masturbate herself as she still got horny every now and then. I told her anytime your horny I'm very willing to help you and she smiled at me. We showered together and then she started making lunch and the rest of the family got home. Alice usually has sex with me about once or twice a month. I still date girls and have even started looking at my sister Patty 21 she is a bookworm doesn't date and I think she masturbates in her room. As I hear soft moaning noises coming thru the wall at times. She's a little overweight and quite short at 4'11" but I think she would be a great fuck. I'm waiting for her to be alone with me and started masturbating herself and I plan to join her and see how it goes.