I had been going out with Cara for a little over a year when things had begun to change. I still loved her, we still went out barhopping and our sex life was out of this world, but things just weren't the same. You see, Cara was different than most of the girls I had been with. Although she was attractive and had the best personality in the world, Cara was the single mother of three bratty kids and her increasingly larger figure was beginning to get in the way of my desire for her. That and her fuck the world attitude. It was cute at first, but then it got to be a bit trying.
To make things worse Cara's younger sister Kristin had moved into the Cara's apartment building a couple of months earlier. She was new to town and had no friends, so she was a constant third wheel. I loved Kristin's company and found it exciting to steal glances at her tight body, but at some point in the evenings I wanted to fuck my girlfriend, so my tension gradually built up over a period of time.
Then Cara approached me at the beginning of one gruelling sexless week and announced she was going out with some girlfriend's Friday evening. I told her I hoped she and her sister would have fun and that I would occupy myself somehow.
"Actually, about that..." she said. "Kristin doesn't really get along with any of these girls, so I was wondering if you could take her out with some of your buddies. Who knows? Maybe she'll hook up and get laid! She doesn't know anyone here and I figure if I can trust her with anyone it's you.
I reluctantly agreed and was surprised when Kristin called me on Friday evening and invited me over for dinner before we went out. When I arrived at her place she had just gotten out of the shower and was wearing her bathrobe. I couldn't help but take in the site of her creamy legs as I sat on the couch. To give you a description, Cara is 33, 5'3" with short black hair, 38 DD's and a voluptious figure. Her sister Kristen in 26, a little taller with long brunette hair. Her tits are small but firm, and she has a tight, slightly rounded body that she had been showing off increasingly since her recent dieting success. One thing the girls had in common was their faces looked exactly alike. As I watched Kristin tidying up the place I couldn't help but wonder if this is what my girlfriend had looked like before the years and kids had taken their toll.
Kristin offered me a beer and when she leaned in front of me to put it on the table the top of her robe opened slightly and I caught my first view of her tits. They were small B's, but they were perfect. I tried not to stare. I mean this was practically my sister-in-law, for chrissakes.
The night continued and we met four of my friends at a bar nearby and proceeded to get our drink on. Kristin was having a pretty good time but wasn't really hitting it off with anyone. My buddies inevitably starting talking about sex and got into a brief discussion about their first time, then their ride announced it was time to go, leaving me alone with a very drunk Kristin. When we were alone we decided to go out back and smoke a joint. I passed it to her and she took a hit, then did something I was not expecting. She stepped close to me, put her lips to mine and blew smoke into my mouth. I accepted and we looked at each other for a few moments before going back inside. After another couple of drinks Kristen really started to open up.
"So your buddies were talking about their first time. Let's hear about yours."
Now my first time was nothing to write home about that, and I told her that. She looked at me with a smile and said, "Well it sounds like you have gotten a lot better. Cara told me no one has ever fucked her like you."
I was taken aback and just looked at her. "She told you that? I didn't know you guys discussed those things."
"Of course," she relied, "we're sisters. We talk about everything, and since I haven't been getting any lately it's been something we've been talking about a lot recently."
"What else did she tell you?"
"She told me she has always wanted someone to love her but make her feel like a complete slut at the same time. She said that your cock is the biggest she has ever had and that you're the only person who has been able to give it to her as rough as she likes it."
