Years apart

I'm Joel 46 divorced 2 grown children, I live in a small outside of the city away from the hustle and bustle. I married at 17 and was divorced at 27, my ex wife Rona 44 raised the children with financial support from me. In late 2019 I moved to my current address and started working from home mostly. When the pandemic started I was already setup to work from home and it didn't affected me much at all. I've always worked in dangerous areas and was use to wearing PPE and so I just followed what was usual work practices for me and kept healthy and got the vaccine as soon as I could. Rona was still living in the city and her workplace closed for the lockdown and didn't reopen. The owner didn't believe in getting the vaccine and got the virus and with an underlining health problem was buried 2 weeks later. So unemployed and wanting to get away from the unhealthy city, Roan asked could she stay with me until the pandemic was over. We've always got on well even after divorce and I said okay you can stay as long as you want. Nothing happened for the first month or so and we kept to ourselves a lot. But at Christmas time with the children and their families visiting it got crowded, I was intending to setup a bed in my home office. But Rona decided I could share her room as it had two single beds in it. My office isn't that wide and I would have had to put the bed down every night and put away again in the morning. One night after a few drinks and having gone to bed, I was awoken by Rona getting into bed with me. At first I thought she had made a mistake and was getting into the wrong bed. But she told me she was really horny and wanted some satisfaction. I was okay with that and we fucked and again in the morning, on the the children returning to their own homes. I moved back into my room and Rona also moved in with me. We have been fucking regularly since then and are content to keep it as is. No plans to remarry and Rona has gotten a job locally. People who don't know we're divorced assume we're married. But we might as well be married, but we don't need a piece of paper to be happy.