There had been four couples at the party. We were the new ones, being invited to swap for the first time. Tim and I knew what was going to happen, but we hadn't specifically discussed the fact that we were going to screw someone else or who it would be. I had been nervous but also titillated at the thought of being naked with another man and having him put his d**k in me. Will's wife Karen was there and I thought Tim might go for her. Instead, he boffed my sister.
Tim continued. "Your sister was wearing that tight buttoned blouse. Her t**s looked so inviting."
I remembered that my sister's white blouse was tight around her midriff and her bra made her t**s look bigger that they are (I'm not jealous, though).
"I kissed her and I had to undo those buttons."
"You've seen her in bikinis an
