Being Supportive To Mum

Hi, I used to have sex with my mum. My dad had a stroke and they weren't physical anymore. My confided in me and told me that she considered cheating on my dad because she needed that physical side of a relationship. I told her I could be there for her but first she was very dismissive of the idea. After a few weeks went by and I thought that topic wasn't history she came into my room and didn't say anything, just climb into my bed and we had sex for the first time. We started having sex frequently for years until I move out and then my dad passed away. Sex within a family isn't always a bad thing.