Mom's second divorce

My mother Rachel divorced my father Keith when I was 12, or rather he divorced her. Then 3 years later she married Leonard and then he divorced her 6 years later. Single again, she started drinking feeling sorry for herself. I'm an only child and thought it was my duty to stay with her. I'm Andrew answer to Andy 25 and attending the local university and living with my mom Rachel. As time passed, she stopped drinking and started to put her life back together. But not dating, that wasn't an option anymore and I didn't date either. But that was because I wasn't comfortable around girls, I was awkward at best. Anyway, as time passed and neither of us dating always in each other's company. Then the pandemic struck, we were together 24/7 and my usual way of relief masturbating became harder to do. As Rachel was always around me, then one day she was having a nap and I took the chance to masturbate. But as I was doing it, she caught me cock in hand. Instead of getting angry she asked did I want a hand, which was a surprise to me. But I accepted and she took over the stroking, after a short time she said fuck doing this let's fuck. So, we fucked, it became our regular lockdown pass time. No protection needed as she had surgery and couldn't children anymore. She taught how to please her and said it would probably please other women as well. She boosted my confidence and after the lockdown was finished, I tried asking girls out. No luck at first that changed and finally bedded one, but it didn't last. Then in March this year I met Dianne and we've still together and she lives with Rachel and me. Dianne is a nurse and works shifts, which allow me to fuck Rachel while she is working. Dianne gets on with Rachel very well and we are now engaged and planning to start our family. Dianne likes her job and plans to continue working as her and Rachel have worked out between themselves about caring for any children we might have.