My breother was 20 yr older than me but was more like a Dad. His wife was short and chunki but not fat with t*** that were always bulging out the top of her bra and blouise, He alwaays joked about me looking at her t***. I went everywhere with them. On my 16 th bday the took me with them to a bar and a dance.The bar owner knew everyone there and allowed them to give me a beer now and than. Sometime during the night my SIL dissapeared and I ask my brother where she was. He said shes in the car she has you bday present go out and get it. I went out and jumped in the back seat it was pouring the rain down and we were pparked on the siade of the bar very dark. I couldnt see it was dark and she said if you ever tell anyone what you got for your bd you will be in deep s***.As my eyes adjusted to the dim lite I saw she had her skirt pulled up and her t*** out.She took my hand and put it on her t*** I was instantly hard and I was scared I said wwhat if my brother comes out she said he wont.She said have you ever done anything with a girl and I said no. She put one leg on the back of the seat and scooted down til she was on her back and said get on top of me she unzipped me and got my d*** out andd guided me to her p**** I was in heaven and only lasted a few minutes.She kept saying slow down but I couldnt.She let me f*** her 3 times beffor she said go back inside. I went in and set down acrossed from my brother and he laughed and said did you like your present.I said it was the best bd ever. He said just keep your mouth shut and you may get more. My sil came in and acted like nothing happened. When we started to leave they got in the back and gave me the keys and they fucked half way home and he told me to pull off he tld me to get in the back and he drove and we fucked 2 more times befor we got to their house. It became a weekend thing until I went to the Army and we never did it again