Home from overseas

I've been away 6 years working and getting regular sex from women while away, paying them as I don't do well usually with women. I Martin 36 and only child of Jason (deceased) and Martha 65, Jason was 12 years older than Martha and got sick with the virus and passed away. I couldn't return as to restrictions at the time. But as soon as my contract finished I headed home. Martha lived alone in their 2 bedroom retirement home, they had bought when I went overseas. So I moved with her on my return, got a good job and settled in. Not having much success dating as was usual for me and so I masturbated. Martha done her usual things and cooked and done my laundry, the perfect wife. Everything except fuck, but I hadn't thought of fucking her and watched porn on my laptop to help me get off. One day I got a call on my cellphone and while on the call I hit the wrong vid to watch. Finishing the call I saw a mature woman fucking a younger man. I was about to to change to another when I got a hard-on, so I masturbated to the vid and also enjoyed it. The mature woman wasn't that different to Martha in body shape and age. That what I thought after watching again and so I started to checkout my mother more closely than ever. Then I realized she was gorgeous and I started thinking of her sexually. But didn't try anything at first, then Martha had a fall and hurt her knee, ankle and back. She needed help dressing and undressing, she would shower sitting on a plastic chair and I had to help in and out of the shower. When she was able to stand, the chair wasn't needed. But she was having trouble washing her back as it was painful to twist. While she used the chair she would lean forward and I would wash her back. I washed back while she stood in the shower and I stood outside. But I usually got wet and finally she said there was enough room for the both of us to shower together. So the next time we were going to shower together, I was okay with that. But when we done the first time I got aroused and she saw my hard-on. She was a little amused by me getting horny over her at her age. I just let it pass and didn't try anything at that time. The next shower together I again got a hard-on and she was amused again, but I decided to see how far she would let me go. Without asking her for sex or feeling her up, I allowed my hard cock to touch her ass and vagina while showering. By touch I mean poke and she noticed it every time, I tried to make it look accidental. But it wasn't, anyway nothing happen that time. The next time another hard-on and same thing I poked her with my hard cock. This time she took hold of my cock and started to play with it and she got me to cum on her belly. She thought that would settle me down, but instead I wanted to fuck her and was soon hard again. Surprised by my getting hard again, I decided to try for something more. Feeling her up and then I tried to mount her in the shower, she said no and I stopped. Thinking I had blown my chances of sex with her, after the shower she was drying herself and I got excited again as she bend over. She saw my hard cock and told me I should take care of it straight away. I looked at her and was going say okay, but she said what the fuck lets fuck. We went to her bed and I fucked twice that evening and spend the night with her and every night since. Regularly fucking her and with her help I met Heidi 28 a girl at the supermarket where Martha shops and started dating her and bedded her and after several months she moved in with us and that includes threesomes. Life is great and Heidi and me will marry in May and we're already trying to start a family.