To start let me tell you my name is Bob, in my family there is one older brother who is 10 years older than me, then my sister Veronica who we call Ronnie is 4 years older, then myself and finally my sister Ann who is 18 months younger.
It was the summer of 1978 I was going to be twenty and would be graduating from trade school in about two months, Ronnie was on summer break from college and was upstairs in her room with her friend Suzy. When they were both in high school I would sometimes sneak upstairs to try to get a look at them undressing when Suzy used to stay over, I only got to see them a couple of times through a crack in the door to Ronnie's bedroom and would go back to my room to masturbate after seeing them. Ronnie was a small girl about 5 feet tall weighed less than 90 lbs back then, had sandy blonde shoulder length hair and very small 32aa breasts. Suzy was the exact opposite about 5 feet 10 inches my guess about 150 lbs with nice 38d breasts and short dark brown hair cut and styled to perfection.
I heard some laughing coming from my sister's room and thought I would go up and see what was going on, when I got to her door it was slightly ajar and I could see both of them on the bed in their bikinis laughing so I knocked on the door then opened it and asked them what was so funny and Ronnie replied just playing truth or dare. I thought that was a game for high school kids and they looked at each other and giggled then Ronnie said its fun come play and patted the spot on her bed right between the two of them so I sat down.
Ronnie said since you just came in you have to be the first to chose truth or dare and she asked me if I ever spied on anyone naked, I couldn't answer that since I didn't want her to know it was them that I spied on so I said I would take the dare to which she said to rub her back for one minute, she then rolled on her stomach and I started to rub her down. I guess I was rubbing too hard and she whispered gently so I rubbed her back more slowly and gently, I could feel her smooth white skin and started to imagine her naked .
After a minute I stopped and she then asked Suzy if she ever wanted to have sex with anyone we knew, Suzy took the dare and Ronnie told her to French kiss me. She slowly then slid over to me and drew her lips to mine and started to kiss me and slip her tongue inside my mouth, I could feel myself get an instant bulge in my shorts so I turned so they couldn't see, Suzy then pulled out her tongue and gave me one last gentle kiss just brushing my lips.
Suzy then said it was Ronnie's turn and asked her if she ever thought of sex with another girl and if so who with, Ronnie smiled and said dare and the dare was to French kiss me her brother. She slid over to my and kissed me on the lips sliding her tongue deep into my mouth flicking it all over mine then I started to flick my tongue back at hers, the bulge in my shorts felt like it was going to rip through the denim. After what seemed like an eternity she slowly withdrew her tongue and I could see her smile.
Suzy then looked at me and asked if I ever ate a girl's pussy and if so who's, I could have answered that since I never did back then but I was wondering what the dare would be so I took the dare. Suzy smiled and said I want you to feel Ronnie's breasts, I paused and said what to which she repeated it again. I wasn't sure what to do when my sister said to me it's ok so I reached up and started to rub her breasts through her bikini top when Suzy said no take the top off and feel them. I slowly reached around my sister and fumbled with the clasp on it when she reached around herself and undid it which exposed two tiny firm lily white breasts with dark brown tiny nipples. I gently reached them and started to fondle them, I could see her little nipples getting harder as I rubbed my thumbs over them. After about a few minutes Suzy said ok guys you look like you're enjoying that too much time to stop.
Now it was my turn, I was getting so turned on and wasn't even thinking about it being my sister and her friend anymore, I turned to Suzy and said how often do you masturbate and who do you think of when if you do. Suzy started turning red and said dare to which I said take your top off and let me feel yours now. She took off her top and I was looking at her huge tits that with huge very light brown nipples, I reached over and started to feel them they were so firm and her nipples were already hard jutting out a good ½", I reached my mouth to her right breast and started sucking it I could feel her body relax and start arch her back. Ronnie finally said ok guys enough so we stopped.
I looked at my sister and thought I hopes she takes a dare then asked have you ever had sex with a stranger, I knew the answer was yes because I heard her one day talking to my sister Ann about one time when she did at a party, she looked at me and said I'll take the dare please. I paused and told her to take off Suzy's bottoms and lick her pussy, I was amazed at how quickly she slid over and took of Suzy's bikini bottoms without Suzy protesting. When her bottoms were off I could see Suzy's very hairy dark bush then Ronnie slowly lowered her mouth between her legs and started to slide her tongue over her pink slit, Suzy moaned with delight as I watched the two of them, I could see after a couple of minutes Suzy looked like she was going to have an orgasm and said ok enough to which they both sighed.
It was Ronnie's turn again and she looked around seeing her with no top and Suzy completely naked, then turned said no more truth now only dare and told me my dare was to take off my pants show them my dick and masturbate. I stood up and took off my shorts showing them my erect 6" penis and Ronnie then says my that looks good, I got harder when she said that and she saw it jump and smiled. I started to stroke myself slowly and after about a minute she told Suzy her dare was to help me.
Suzy reached over and wrapped her hand around my stiff dick and started to stroke it, Suzy looked up at Ronnie while she was stroking me and said ok your dare it to drop your bikini bottoms and play with yourself so your brother can watch and she immediately shot up off the bed and took them off, I had never seen her pussy before it had very light brown almost blonde hair and only a little you could see her pussy lips without her even spreading her legs. She sat down in front of me and took her fingers and spread her pussy apart for me it was a tiny pink slit that was already wet from excitement then she slid a finger inside of herself, my cock started to twitch and Suzy said boy you must enjoy seeing your sister you must have a thing for her as she looked up to Ronnie and gave her a wink.