Horny during the Lockdown

I'm Joel 24 and live with my divorced mother Lydia 43, I'm her only child and were living in an old house we rent together. Not able to get out and about, became very boring very quickly. I'm no good looker myself, but have had some successes with women. Lydia isn't a centerfold chubby and plain looking. So we're sitting watching T V and I was bored out of my skull, Lydia said we should try something else to break up the boredom. I said without thinking I just want sex, Lydia added she wouldn't say no either. I was a little shocked at my previous remark and then got a little excited by her answer. But I didn't think she would have sex with me, but decided to tease her a bit. Responded okay let's fuck and waited for her to react. She stayed silence for a time and then said okay it will be better than playing with myself. She stood up and started undressing, I was stunned at her reply. But it passed and I decided okay let's fuck. So we did and that was the start of regular sex during the lockdown between the 2 of us. After the lockdown lifted we stopped fucking each other and started looking for separate sexual partners. But everything was slower and people weren't as before the lockdown, preferring to keep a distance rather then get close. After a week or so and sex, I asked Lydia for a fuck again and she agreed. We've continued off and on with a sexual relationship since then. Broken up by casual relationships for either or both that don't really last long and we return to fucking each other.