I have been trawling the internet ever since this incident happened to try to explain it. It is through this that I came across your very erotic site. Let me tell you what happened.
Last week my daughter-in-law, who is 22, was at our house as is often the case. I was complaining that I had back pains. To cut a long story short she is doing massage therapy at college so she was eager to practice on me. So we went upstairs on the double bed. I was in my un flattering under wear. She was in her jeans so she took them off and put on a pair of tracksuit bottoms. Because it was a double bed and not a table she lay me face down and straddled the top of my legs and began to massage my back. There was absolutely no sexual contact whatsoever. I have always considered myself 2000% straight. I even disowned a close friend when she attempted to make a pass at me one night when I was moaning about my husband many years ago.
Anyway Joanne was massaging my back and eventually she ended up sitting on my bottom while she worked. I don't know when or how but as she pushed down on my back I began to get a tingling feeling 'down there'. The more she pushed my back and bum into the bed the stronger the feelings got. I just lay there not knowing what to do. It just got more and more intense and more and more pleasurable until I was in the middle of a very slow very wonderful orgasm. But it did not come from my clit it was 'inside me' I had never experienced anything like it (my husband has never made me cum).
The only thing I could do was grip the bed and bite my lip (so much so that it bled) otherwise I would have screamed the house down. It seemed to last ages. Joanne noticed me gripping the bed and stopped and asked if I was alright. To which I could not respond. She got so worried she turned my face over.
I don't know if she knew as I was red as a beetroot and breathing like I had done a marathon. The only thing I could say was that it hurt a bit. I sent her downstairs and told her I would be down in a while. I just lay there in bliss it was truly wonderful.
I can't stop thinking about it (or her if I am honest). I went for a professional massage just to see but felt nothing. I have began acting strange around her. The other day I slightly opened my mouth when she kissed me goodbye. How can this happen to me at my age!