Sister is best

I've had quite a few relationships and all failed and only when my sister Ruth 27 got drunk and slept with me did I find my perfect woman. I'm Vincent 30 and have a great job in I T and have bought myself a home, which I'll fully own in another 5 or 6 years. The morning after I had fucked Ruth I was really horny again and she was now sober and decided to let me fuck her again. She was only visiting at the time, had come for a job interview and went out afterward to let off steam and drank too much. She got the job and moved to the city and decided to again stay with me and also join me in my bed. She takes great care so not to get pregnant, but also helps me lay her female friend Shelly 28. That's usually ends up as threesomes, Ruth likes females as much as she likes my cock. Only problem Shelly wasn't as careful as Ruth and is now pregnant to me, Ruth told me to marry Shelly. Which we are doing next month, Shelly has moved in with us and willingly sleeping with Ruth and me. Shelly is an only child and only has her mother Trisha 47 widow and Ruth has also bedded her. Trisha got drunk and Ruth took advantage, I fucked Shelly that evening. Anyway Trisha is also going to live with us and Ruth wants me to fuck her before the wedding. This weekend hopefully, Trisha already knows of Ruth and Shelly relationship. After I fuck Trisha, Ruth plans a foursome.