Mother in Law

My mother in law Rita 56 divorced and was unemployed due to the pandemic moved in with us. I'm Charles 27 and married to Pamela 25 pregnant and we already have 1 child Kerry 2, I work from home and Pamela works in a lawyers office. So I take and pickup Kerry from daycare, Rita is slender and pretty good looking for her age. But unable to find a job and unable to go out much, she got bored. She started hanging around me while I was working at home and it was causing a distraction to me. Then last month I asked her what was her problem. Her reply shocked me she said she was really horny and needed fucking. I asked what has that got to do with me. She replied I can't go anywhere and your a man and Pamela is pregnant and your not getting any, I thought we could help each other out. I still a little shocked, but my cock went rock hard. I decided to take her up on her offer and fucked her on my desk and than in her bed. This became a regular almost daily thing for us. Pamela then asked me would I fuck her mother as she was getting cabin fever from being shut up all the time. I just looked at her and she added well your not getting any and it will help satisfy you as well. 3 days later Pamela thanked me for fucking Rita and that night she had Rita join us in our bed. Rita had told Pamela I had started to fuck her, but not that we were already doing before she had asked me to fuck her mother. Everything is great.