My mature Friend

Last year during the first lockdown, I was alone as usual for me. I'm not a people person you could say, I don't know many of my neighbors as I keep to myself. I also work from my house and don't interact with many people at all. I'm not shy, just couldn't be bothered getting to know anyone. The people I interact with are mostly family or work colleagues and people who make all the effort to get to know me. I'm a bit like Sheldon in big bang theory, but not as self absorbed. I freely admit I don't know everything and don't have a special spot. But I like to read and garden and have a dog named Duncan, because he's a rescue dog and that what they called him. I could have changed it, but he answered to it so I kept it. So the lockdown wasn't a real problem to me, excepted going shopping at the supermarket changed to ordering online and having it delivered. Which is how I mostly do it now, anyway I was working in my garden and my neighbor Rachel 63 widow was working in her garden as well and she introduce herself to me. I had seen her before, but hadn't spoken to her. So we started talking about gardening and a friendship developed, Rachel isn't a computer user and rang up for her groceries and I showed her how to use a computer and get what she needed online. After a couple of weeks we started having meals together and hanging out together. Rachel reminded me of Alice from the Brady Bunch and I look like Stewart in big bang theory except with glasses. So being the only person I was seeing regularly in person , except the delivery people. Rachel and I got really close, after dinner at her place and playing a board game. It was getting late and with Duncan laying beside table we were using. I started thinking of heading home, then there was a loud crack of thunder right overhead and the whole house shook. Duncan darted under my chair and both Rachel and me got a fright. Soon after the thunder it started raining very heavily and Rachel suggested I stay the night. Rachel has 2 bedrooms and I expected to use the spare bedroom. But it was used as a storage room by Rachel and there was boxes allover the bed and most of the floor. So Rachel said I should share her bed. Nothing sexual was in my acceptance and so we went to bed and it was still raining heavy. Duncan laid beside the bed and we went to sleep, during the night I had to pee and when I returned to the bed. That when I started thing of Rachel in a sexual way and got a hard-on. But just tried to get back to sleep, my moving about had awoken Rachel and she turned towards me and seeing me awake asked was everything okay. I said yes and then another crack of thunder a little further away and Rachel asked could she cuddle up to me and I said yes. I still had the hard-on, but didn't think would be a problem and would go down by itself after awhile. But Rachel cuddling me and me laying on my back, Rachel laying on her side. She moved her leg over my body and it was then she felt my hard-on pressing against her leg. Moving her hand down and started to play with it, then she asked me did I want to use it on her. At first unsure how to respond, then she told she was willing if I wanted too. So that was the first night I fucked Rachel and we have been fucking regularly since. Neither of us think of the sex as anything else except just mutual satisfaction, which we both enjoy a great deal. I have installed a gate between our yards and we sleep together without sex and fuck anytime we get the urge.