My family was renting a cottage about 150 yards from the oyster flats in Truro Massachusetts. My 32-year-old sister Danielle, my 35-year-old sister Kelly, my Mother and Father took our usual three-week vacation to the far end of Cape Cod in 1997.
It was mid August and the tourist season was past its peak. Route six was and still is, the only two lane road on and off the Cape. I remember the heat was well into the 90's and blazing hot sunshine almost every day. The cottage was one floor on the main part of the house and two stories on upstairs part with a vaulted ceiling, separate from the main house. It was an interesting layout which afforded my sisters and I some privacy from the parents. All three beds were in each corner of the room.
Sleeping in the same room as my sisters was fine with me, I was a horny 18 year old during my last summer before graduating high school.
After the first week we all got into our rhythms. Mom and Dad would wake up and make coffee, Danielle being the cyclist she would go for a bike ride, and Kelly could be found reading the latest Stephen King novel on the porch that overlooked the dirt road which led to the beach.
I had opened my eyes on one of the hottest days of the trip and was sweating, so I got out of my bed and walked over to the wall switch to turn on the ceiling fan to cool us off. Danielle was getting ready for her bike ride, and I was watching her. She had a bubble butt and most girls would try to hide it, she almost flaunted it in a naïve manner. I watched her slide her black spandex shorts up and over her butt cheeks. Put on her bike shirt over her sports bra and grabbed her shoes and left. I started getting an erection so I jumped back into bed with a clean sheet.
Kelly was still sleeping. I could see her from my bed. She rolled over and her ass became more exposed. Her ass wasn't as pronounced as Danielle, but still very beautiful. She always slept naked, especially in the summer, and she knew I liked looking at her.
I had to piss so I got up and headed for the bathroom. Like all men in the morning, my cock was rock hard. I passed by her bed and saw one eye open looking at it. I shut the bathroom door and did my thing, splashed cold water on my face and went back out into the room. I looked to my right where Kellys bed was and she was on top of her blanket, with her ankles behind her head staring at me.
"Kelly what are you doing Mom and Dad are right downstairs!!" I said quietly but firmly.
"Kevin, I'm incredibly horny and I know you're eighteen and fuck a lot of girls, just fuck me real quick. Sex is fantastic and its even way more incredible between loving siblings. We love each other. Don't worry about them, they are doing their thing and don't ever come up here. We can hear them if they do anyway. Just stick it in me a few times." She told me.
I was so nervous and excited at the same time. I peeked out every window, made sure the glass door was locked, double checked the windows, and closed the blinds. This made Kelly laugh. I guess she though it was cute.
