Like Mother like Daughter

In my twenties I started regularly fucking my older sister her husband had gotten her pregnant at college married her to just please his family to keep having access to the family fortune. Neglected her thereafter, a bit of a wild child, always trying something new. Never made the same mistake, had affairs but didn't get any pregnant. My sister couldn't just meet men, as if she got caught, she would-be out on her ass and lose custody of her daughter. But having your younger brother visit you doesn't raise any flags of concern, especially as he isn't thought as a ladies' man. My sister decided as her husband wasn't fucking her to use her brother instead. I was 23 when my sister then 27 got me to fuck her for the first time things changed 7 years later. My brother-in-law always the risk taker, took one risk too many, now widowed and with a 13-year-old daughter to look after. I was then married and had two children; my wife was career driven and was less than forthcoming sex wise. But I'm highly sexed, once a week wasn't cutting it, so I would visit my sister, and she would provide extra sex for me. I was quite happy with my lifestyle. My sister preferred to avoid relationships, being the mournful widow suited her. To stop accidental pregnancies, she had her tubes tied and as time passed it was her lifestyle being in mourning and not dating. She had been acting as the faithful wife for so long, it didn't occur to her to change. Even now she was widowed, things took a delightful twist for me. First it started with my wife thinking she had gotten pregnant again, not a great time careerwise. But she wasn't pregnant her period was late, she decided to get fixed up as she called it having her tubes tied. So, I could fuck her, and she couldn't pregnant, and it increased our sex life a little, from once a week to 3 a fortnight. My niece had turned 18 and was a plain looking girl who showed no interest in dating at all. But after she turn 19, she must have decided she wanted to lose her virginity. But she had no boyfriend or anyone boy she liked enough to have sex with. She only had one male she trusted enough to take her virginity, me as her uncle who was always close by and a great deal caring towards her, her late father had been more of a stranger than a father. Her mother trusted me more than any other male and had said so to her. But she didn't know I was fucking her mother either, she was always at school or somewhere else when had sex. She waited until she got me alone and straight out asked me to fuck her, I was shocked at first hadn't seen it coming, but the signs were there. Anyway, I said I would think it over and she left it at that. I knew she would ask again, but I didn't know what I should do, so I asked my sister what she thought. To my surprise my sister thought it better that I was her daughter first lover as according to her was great lover and would give her daughter a great fucking. But then she suggested we make it a threesome, saying it only right we had no secret anymore from her daughter. My niece knew what an asshole her father actually was and that's why she looked towards me. Anyway, my sister had a quiet talk with her daughter, suggesting a threesome for her losing her virginity. At first shocked but on thinking it thru came to accept it as the best way forward. Not really shocked over her mother and mine love affair, the plan was made. My children were to stay with my in-laws and my wife would be away as well and would pick up the children on her way home. I would stay with my sister and niece, and we would have the threesome. On the day we took our time and made sure she lost her virginity the best way possible. Serval one on one fucks followed over the following day and other threesomes. I think we did too good a job, as my niece isn't looking for a boyfriend prefers having me fuck her instead either in threesomes with her mother or just one on one with me. As I said I like sex and fucking my willing niece is just perfect in my view.