It Started July 4th

I'm 46 divorced 2 children who are living with their mother in the city and the youngest has just started college, the other is training to become a hairdresser. I moved to the country after my divorce in 2023, my sister 42 also divorced came for a visit at the beginning of July. Her son is in the Navy and overseas, my sister had been retrenched from her government job. Not really unhappy that she is now unemployed, says it's a real clown show and she is glad to out of there. Highly qualified she has since got a great paying job and works from home (my place). I also work from home and wouldn't change back to going into an office again. Anyway, we were sitting at the kitchen table and started mucking about one thing led to another and we became lovers. We haven't stopped our sexual relationship since; we feel it suits us. We keep it secret from our families, mainly because it's none of their business.