Pregnant by my 17 yr old nephew

5 months ago my sister moved in with me while she was pregnant. She is my only sister,we had such a terrible childhood,we formed a bond together that only death will break. We were born in Berlin Germany,I was born February 14 1972 ,my sister Amanda was born February 14 1975. Same day exactly 3 years apart,our birth certificate shows the exact time of birth at 2:14 am. Strange time matching our birthday help creating our special bond for each other. My sister was 7 months pregnant when she moved in with me,so I could help her during her late stages of pregnancy. Amanda is married to an older man who isn't able to give her the help that she was going to need. Just over 2 months ago,her son Bobby he is 17 my nephew a very handsome and sexy young man, came by for a visit. He had brought some wonderful weed to smoke with us,my sister didn't smoke nor drink while she was pregnant. We sat in the den getting high, drinking some beer and talking. Bobby asked me.. when was the first time that you had sex with my mom? Ok I was thoughtless when Amanda said 1987 I was 12 and Tina was 15 . I looked at my sister and smiled and said you are so right and I leaned over and started kissing my sister and squeezing on her breast and pinching her hard nipple.really turning on my nephew. Without giving any warning,I got up and walked over to Bobby,I reached down and unbuckled his belt, unbuttoned his Levi's, zipped them down and pulled down his pants and underwear down to his ankles. I got in my knees, and started to suck on his dick, taking al 7 inches in deep throat. It didn't take him but about a minute before he shot his hot sperm down my throat . Amanda almost 9 months pregnant can't take any penetration so I got up and told Bobby that he taste good and walked over and started kissing Amanda, letting her get some of her son's sperm from my mouth. I slid down Amanda's shorts and removed them,I crawled up between her legs and started to lick at her cum filled wet pussy, she tasted so good as I was on my knees with my head buried deep inside my sister's pussy,my nephew came up from behind and put his dick inside of me. Caught up in a hot moment of passion I have not been letting anyone cum inside of me because I didn't want to get pregnant,but my mind was in another world as I felt my egg dropping orgasm starting to build. Bobby was really fucking me hard and fast , Amanda was having orgasm I exploded cause chain reaction of organisms from uhhhhhhhhhhhh uhhhhhhhhhhhhhhhhhhhh uhhhhhhhhhhhhhhhhhh to oh shit. I could feel his hot sperm pumping through my uterus into my tubes oh God it felt so wonderful. I told Bobby to eat his mom and he got between Amanda's legs and slurped away at his mother's pussy. I crawled up between his legs and cleaned off his dick. We enjoyed each other for hours. I had to fly to Germany to make some adult videos I put my new videos on mature tube.com Busty Tina. Just found out yesterday that I am 2 months pregnant