Anyone find this BDSM story?

I'm trying to find a story, maybe on Literotica or one of the older fiction sites. It's a couple swap... opens with the gal dressed in something short and tiny, he ties her and drives her to a friends house. In just a few paragraphs there are 4 wives, hands bound over head, all blindfolded. The husbands draw numbers, each takes home a girl different than the one he brought. There are lots of costume changes and orgasms. Each is to be returned to the appropriate home in the morning. It was well written and inventive, but I can't find it. Anyone know this story / stories?