At the third party we went to the ground rule was we would only swing in the same room. No more going off alone. I wanted to watch Mary getting fucked when it happened. She said she enjoyed watching me fucking other women too and really liked that rule, but I can never be sure with her if she is just going along or actually thinks something is good. We have lived by that rule ever since, though.
Mary started off the third party wearing just my shirt and her panties. After we had sex with another couple Mary decided to leave her panties off. We went back to dancing.
I noticed when Mary danced with no panties on the guys usually went straight to massaging her clitty and finger fucking her. They hadn't done that when she was wearing panties.
When I mentioned my observation of this to Mary she smiled and said something about making sure she didn't wear panties anymore. Mary draped herself against another dozen or so men while they fingered her little pussy on the dance floor.
At the next party Mary left her panties off from the start, just as she said she would. She said what more could a girl want then great kissing and getting her clit massaged.
We swapped with a few more people. Mary insisted any sex had to happen in the common room. She said she wanted an audience every time.
Over the next several months I had sex with one or two women at each party we went to, and Mary had sex with two or three guys. She reminded me we weren't counting. She had more opportunities, and she did turn a lot of guys down.
I asked her about how she decided who to turn down and who to accept. She said if a guy asked, she always said no. Mary's opinion is if a guy doesn't have the balls to just do what he wants to do to her he doesn't deserve to get to fuck her.
Then at another party, maybe the tenth one over about seven months time, a cute little Philippine girl slid into my arms on the dance floor and asked me if we wanted to play. She kissed me while I held her pert little body against me. When we broke the kiss I said I thought we should get our spouses. She told me her husband was dancing with my girl, and it sure seemed like he wanted to play with her. Of course, he was playing with Mary's pussy already.
Lucy led me over to Mary, grabbed Mary by the hand and led us both over to the side of the dance floor. Her husband's name was John. As Mary followed along holding hands with this little oriental beauty Mary smiled happily. Mary didn't seem at all bothered about being grabbed by the hand and led along by this girl.
I will say here a few things about Mary. She has always liked girls. She likes girl watching. She has enjoyed girl watching with me since the day I met her.