Samantha--or Sam as she preferred to be called-- was 18 when she came to live with Kate and I. It was the summer before her freshman year and we happened to live in the same town where Sam would be attending college, so it made sense for her stay with us and get a feel for her new town. My wife's sister was about ten years younger but they shared a lot of the same features. Sam had essentially followed in Kate's footsteps; both were competitive swimmers in high school and have toned, athletic bodies. Both are blonde and have big brown eyes. Sam is about 3 inches taller (and actually about the same height as me at 5'9") and had a smaller bust and a more powerfully built lower body.
It seemed like a great arrangement for everyone involved. Kate's summers as a non-profit organization's fundraiser are busy and since I teach high school math, I have a lot of time to hang around. Unfortunately I'm not known for my domestic skills so instead of paying rent, that is where Sam helped us out. She waited tables a few days a week, but the other days she would cook dinner or do a load of laundry and was otherwise free to hang out. While Kate is always on the go, Sam is more like me and can kill a whole summer afternoon at the poolside with a good book and a cold drink.
It was one such afternoon that we had a conversation that changed our relationship forever. She was about half way into Madame Bovary (required summer reading for her lit class) when she looked up and asked me point blank if I'd ever cheated on her sister.
"No--of course not!" I replied.
"You're a good guy, so I kind of figured that, David. But have you ever come close?" asked Sam.
I paused for a bit and had to think. I don't think I had ever really planned to go through with it, but there was one drunk night where I was propositioned by a female friend from college and had given it some thought. She was an entirely different kind of girl than Kate or Sam--loud, very curvaceous and sexually aggressive--but I ultimately decided against it. I'm not sure why I chose to confess this to Sam, but as soon as I did, she promised not to tell my wife. "Your secret's safe with me."
Feeling both relieved and a little bit exposed, I asked if she had ever cheated on her past boyfriends. Sam paused for a second, looked down and then right into my eyes.
"No....actually, I'm still a virgin." she said in a soft tone,. She was definitely embarrassed. Sensing this, I reassured her that she would eventually find the right guy. She smiled a bit awkwardly and rolled over onto her stomach. A few seconds later she unhooked her bikini top to even out her back tan.
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Later that night, after dinner and watching a movie in the living room, Sam went off to her bedroom to catch some sleep. Finally alone with Kate I mentioned what I had found out about her sister earlier that day but left out the part about me confessing to have almost hooked up with an old college friend.
"I'm not surprised," started Kate, "she has always been a bit awkward around boys. I'm not sure if you knew this, but years ago she used to be so jealous of our relationship. It was actually a problem--I could never talk about spending time with you without her getting upset."
In my mind I wondered if it was just the relationship she was jealous over, or me in particular, but I didn't mention that. And awkward or not it was surprising that a girl as pretty as Sam hadn't been more popular with the guys. Instead, since I could tell that the talk had puffed Kate up with a bit of pride, I escorted her back to the bedroom. We made love passionately and also a little louder than usual. I guess I had a bit of pent up sexual energy and so I focused it on making Kate orgasm hard. Looking back, maybe some part of me wanted Sam to hear. Laying there afterwards sweaty, tired and a bit dehydrated, Kate said something that surprised me: "I really hope Sam gets laid this summer. She doesn't have enough confidence; college will be easier if she has a little experience." I heard the words, but they didn't really register in my post-coital bliss. We kissed goodnight and I was off to sleep.
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When I awoke the next morning it was to a beam of sunshine coming in through the blinds and the sound of rustling in what I thought was the next room. Barely awake, I pulled the covers off and swung my legs over to the side of the bed. I stood up, vaguely aware that Kate had gone off to work hours ago and headed towards the bathroom. I slept naked after our romp and since our master bedroom, walk-in closet and bathroom are all behind a door off of the upstairs hallway, I didn't think twice. I should have. I was stark naked in the middle of the room when Sam emerged from the closet with a basket of dirty clothes.
