My girlfriend's bi polar aunt | 2016

I started dating my wife when we were both 19. My wife was a hot 19 year old and I loved her but many times love is no match for hormones. When we first began dating she was living with an aunt. I didn't meet her aunt for a few months but I heard all about her. She's bi polar but back then un diagnosed. She was either in a horrible mood or extremely affectionate. I imagined a mean old lady because to me aunts were all old. When I finally met her I was kinda surprised. She was around 38. This was before we had the term milf. She was a petite woman. But with a large rack. They were most definetly fake but at 19 I didn't care. She was cute and very flirtatious. My wife encouraged me to be nice because her aunt seemed to like me. Nobody wanted her to get mad. Thinking back she was clinging desperately to her youth. After a few months of dating I was asked to do occasional errands. I would go over and do yard work or hang Christmas lights, etc. Sometimes my wife was there other times I would just go over when it was best for my schedule. My wife had a very set schedule with school and work. Mine was always flexible. Free time. Sexy aunt. I was there to put together a bed for my wife. After about 15 minutes her aunt came home. She came in and I got up to say hi. She greeted me with a busty hug. She asked where Alana was. I told her working but that I was just there to build the bed. She smiled and left. About 15 minutes later she came in wearing a tiny pair if shorts and a thin t shirt. She told me she was there to help me. Lots of bending and touching took place. Next thing I know she was pushing her ass against my dick. She noticed my erection and ask if I was horny. I said kinda. She said if anything happened that we could never tell Alana. I agreed. She just pulled down her shorts and I fucked her. I came in her and that was it. Lasted maybe 8 minutes. This happened a few times but my wife never found out.