Sister return

I was widowed in 2019 and my 2 children had their own families, so I downsized and moved to a small town. I was 57 and my wife had died in a 3-car accident, I only had a one sibling a sister 53 who was overseas going thru a divorce. After it was completed, she returned and came to stay with me. Our parents were also deceased, and I was where she came first. That was early 2020 and she was to stay until she got sorted. But as we all know the pandemic started and a lockdown imposed. So, she had to stay with me until the lockdown was removed. She also had 2 children, and both were making their own lives like mine were. Unable to do much except gardening, watch TV and read books, I could still work but the work level dropped off over the lockdown. Project were finalized and no new ones were incoming. I got horny every now and then and done whatever it took to get relief. Which ended up in my sister catching me masturbating in the shower as I didn't lock the door. At first, she was a bit shocked recovering quickly she got undressed and joined in the shower and helped get me off. Of course, we progress to actual intercourse and took no precautions as she was beyond having children. The sex was passionate, and we tried different things. Including anal once, she didn't like it and we haven't bothered doing it again. She likes to be on top, and I really enjoy it as well. She has stayed with me; she feels no need to start anew somewhere else. Our families visit and none know we're fucking every chance we get. We do travel to visit our families as well and are rarely parted for very long. Perfect relationship.