Perfect lover

I'm Reg 43 divorced last year and 2 grown children who are out on their own. Married at 17 due to ex wife getting pregnant. But had a good relationship mostly and only divorced after last child left home. We parted on good terms and as we both had good jobs, I didn't have to pay any maintenance. But I had to find a new place to live, only having one relative in the city, I was able to stay with her. Grace 60 my mother's only sibling, Grace had never married or had children and worked at a research center. After the first few days, I was home reading in my room and heard a soft moaning thru the wall and went to check to see if Grace was okay. I hadn't even thought that Grace might be still sexually active at her age. I opened her door without knocking and caught Grace using a battery powered dildo on her pussy. This was a double shock for me, as I wasn't expecting to her naked and playing with herself or that looked so good at her age. It was a great shock to her as well getting caught masturbating. After an awkward silence I said sorry and was about to leave. Grace seeing I had a bulge in my P J short, asked to see it as I had seen her. I agreed after a little time thinking, she told me to come closer to her. Then with me standing beside her bed, she sat on the edge of her bed and started to play with cock. Then she asked me would I do her a great favor and fuck her, I was a little shocked but also horny and agreed. After I had fucked her, she thanked me and said anytime I'm willing. We laid together talking and she told me that she never married because she was unable to have children, but didn't say why. I was just thinking about returning to my room and Grace asked to stay the night with her. So I did and fucking again in the morning. Grace was a very sexual woman and would asked me for sex more and more. Finally we just started to sleep together every night. I have started dating, no woman in particular at present. But I can always get a fuck from Grace whenever I want, I'm not moving anytime soon.