We had met Ron and Kat at a neighborhood meet and greet. We had quickly established that the four of us were swingers and they had invited Cindy and I to their home that evening along with a few other friends.
Kat and Cindy had agreed that the first party fuck of the evening would be the four of us. I had fulfilled my mission, spurting my first load of the evening into Kat. Kat had sucked on my cock for a while and both Ron and I were hoping for me to cum in her mouth as he watched and as Kat's cunt was being pounded by another "guest". But her pussy had greater need so I followed her request and stuck my cock into the pool of cum already inside her. Ron was more of a watcher than I was. I preferred to watch Cindy fuck and suck after I had exhausted myself and Cindy was just getting into high gear. By the end of the evening Cindy had fucked and sucked off a number of the party guests, but not Ron. I had thought that every guy there had said "Hi, welcome to the area" by sticking his cock into some opening of Cindy, if only for a minute or two. Long enough to say: "Been there, be back soon.". Ron hadn't. Ron had told Kat, Kat told me, I told Cindy.
Cindy said: "Oh, really?"
We were all aware of that the morning following the party as we had rejoined Ron and Kat at our place for a cup of coffee, a nude swim and whatever.