At the culmination of a threesome this past spring with my wife Ann and her sister Brittany, Brittany was right on the verge of an orgasm just as my own climax reached the point of no return. One of the few boundaries in the relationship among the three of us was I wasn't going to cum in Brittany's pussy, so I reluctantly pulled out, finishing on my sister-in-law's boobs and, unfortunately, denying her the orgasm she deserved. It was shortly thereafter that she and my wife agreed that I owed Brittany that climax. I didn't mind being in Brittany's debt this way as long as it didn't continue on too long.
One of my readers suggested that the debt be paid in installments and with interest. Joke or not, I told it to Ann and suggested it to Brittany a couple days later. They did take it as just a joke, but the good news is my wife quickly arranged an opportunity for Brittany and me to hook up. The only condition was that Brittany's husband would get a night with Ann, which was standard. More than a year had gone by since all four of us got over the silly hangups of including others in sex, so long as everyone was having fun and no one's trust was being violated.
Ann was talking to Brittany on the phone and suggested that she come over Thursday night. It made sense because I was leaving on a business trip the next morning, and Brittany was my ride to the airport. Ann couldn't take me because the flight was early and she needed to be home with our very young child. Ann used it as an opportunity to do a late night at work, allowing Brittany to have some time alone with me after my very young daughter went to sleep. That way, after Brittany and I had squared away my debt, Brit could just spend the night and take me to the airport in the morning while Ann and our baby continued to sleep.
Thursday night, Brittany arrived around 8 pm. By then, my kid was fast asleep. After all the experiences I had shared with my sister-in-law over the past year or so, we had gotten very comfortable with each other, so we were having fun chatting with each other as soon as she got there. We were about to have a lot more fun very soon.
Not at all to my surprise, Brittany was looking very good this night. While she wasn't quite as hot as Ann, she was the only other girl in the world who had my attention close to how Ann did. Tonight her brown hair, dark but a lighter shade than Ann's, was loose down to her shoulders. She wore a tank top and jogging pants, which may not sound super sexy to you the reader, but she knew how good I thought she looked in workout clothes. The pants showcased her tight round ass, rivaled only by my wife's behind, and the form-fitting, low-cut top showed off her best feature: her magnificent breasts. Brittany was very short at about 5', but her slight and slender frame was blessed with boobs that sometimes, depending on what she was wearing, had me in awe. My wife would know I was lying if I ever said Brittany's breasts were less arousing than my wife's - which is saying something, because I know a bunch of guys who have seen my wife's tits, and none of them were less than impressed.
Brittany and I sat down next to each other on the couch as we chatted. There was only one other time that just the two of us had had sex, and we had gotten right to it. In this moment, I think both of us weren't sure what was the first move to make. With my wife, it is always romance that leads into our lovemaking. This case was different since tonight was not about intimacy or romance. It was strictly for fun, and neither one of us were very well-versed in one-on-one sex for the sake of simple enjoyment. So I did the only thing I could think of in that moment, which was to lean in and kiss my sister-in-law on the lips. I continued to lean in, still kissing her, pushing her gently onto her back on the couch.
My conscience plagued me a bit as I made out a little with Brittany. As odd as it may sound, having put my dick inside her before didn't seem like a violation of the intimacy reserved only for Ann. Even if after the fact Ann said it was ridiculous for me to be concerned about making out, it still affected me enough in the moment that I pulled back, now captivated by her deep brown eyes and, yes, her magnificent breasts that were bursting out of that tight shirt.
Ill-advised or not, the kiss got the response I needed as Brittany heated up and began to pull at my shirt, a look of excitement evident in her eyes and smile. I helped her with the shirt, pulling it off and then asking her to return the favor. She complied, sitting up and taking her top off, giving her boobs more air but leaving them constricted still behind her bra. If I wasn't completely hard already, I certainly was now as I anticipated seeing my sexy sister-in-law's bare breasts in another moment.
