My old friend's son

I'm 55 divorced and kept busy with my business and usually seen just my old school friend. She was in the same school and university ever since I was 7. She was married and had 3 children all grown and only the youngest live at home still. My 2 were making their own lives and I see them once or twice a year. My friend's son was really shy with strangers, but I'm no stranger, he has known me all his life. So, when my friend and her husband went to visit their oldest child and his new baby girl his second child. I said I would keep an eye on their youngest. They left on a Friday afternoon and their youngest was at university and had been told to come my home for his dinner. I got home at 5pm and started making dinner at 6, he turned up and we had dinner and talked a bit. I saw him looking down my top, which I had seen him do before. I asked him did he want a better look, just to tease him a little bit. But he went into a panic, I told there was nothing wrong with him looking and I was flattered that she thought I was worth looking at. He calmed down a bit and I told him it would be our secret. He then surprised me by asking was I still going to give him a better look. It caught me by surprise, but I decided what the hell and said yes. I opened up my top and then removed my bra, he got an instant hard-on. I thought I should see his hard cock, as I had shown him my breasts. He hesitated at first but lower his pants. I myself now got aroused and decided to go for it, he hesitated but did as I wanted staying the night with me. I don't work weekend so fucking him was all I did. Each fuck better than the last and when his parents got home, I was a bit disappointed as I thought the sex would stop. But he would visit me fairly regular, and we had sex each time. But then I had a good offer for my business, and I could move closer my daughter and her new family. But I'm quite confident he will be well satisfied sexually as he has started fucking their neighbor 49 (spinster). He was asked by her to help move something and one thing led to another. He isn't backward with women he knows, so I can leave him to satisfy her more often now. I taught him well.