My Sister

I am probably going to hell for this. I live aline and very comfortably. I have FWB but no real partner. My younger sister is 42. She caught her husband cheating on her and left him. She had no place to go so asked to stay with me. I agreed and now share my home with her and my niece who is a freshman. I have a large home so we have our own rooms but my life has seriously changed. living with two females is far different then living alone.

My sister was depressed for the first few weeks and didn’t want to do anything. My niece was the typical teenage girl. Eventually, my sister agreed to go out with a few friends for drinks. My niece was over at a friends house so I called a FWB thinking I would have some fun. We had a nice dinner and were in my room making out when a car pulled up in my drive. Looking out the window I could see my sister and some guy I didn’t know. They were talking and I was about to go back to my FWB when he leaned in to kiss my sister and looked like he was trying to feel her up. She pushed him away and started to get out when he grabbed her and pulled her back in. I see she was struggling so I excused myself a raced outside. I am a big guy and I am not unfamiliar with physical violence. I opened his door and grabbed him by the shirt pulling his scrawny hipster ass out of the car. I slapped him a few times before throwing him to ground. By yhis time my sister was out of the car crying. I gave the guy the option of getting in his car and leaving or getting his ass kicked then leaving. He was terrified and quickly got in his car but as he was getting in he called my sister a whore so I helped him into his car with punch to his nose. He drove off bleeding all over his Tesla.

We went inside and my FWB excused herself saying something about calling later and that I should take care of my sister. I was disappointed but understood her leaving. I sat with my sister on the couch talking. She was drunk and crying. I was holding her and realized how sexy she was. Maybe it was a combination of adrenaline from the recent violence and my sexual frustration but I became very aroused while holding her. Whole stroking her hair I kissed her forehead which lead to kissing her her cheeks then her mouth. We froze, lips together for a few heartbeats then it was like a tidal wave of passion. We were kissing and touching and exploring each other's bodies. Our clothes came off and we had amazing sex on the couch. We then proceeded to my room where we had sex several more times that night. We woke up the next day naked in bed together. I thought it would be awkward but we just continued without saying a thing. We then showered together and it wasn’t until we were eating breakfast that we actually talked about it. We both agreed that it was the best sex either of us has had. We also agreed that there was no way we wanted to stop but we needed to be very careful so my niece wont suspect anything.

It has been three weeks since that night and we have been together almost everyday. My sister is no longer depressed and has a job interview this week. My niece is relieved that her mom is happier but I think she suspects something is up. I have not called my FWB back and don’t think I will. My little sister is the perfect lover and partner.