Please help finding a few stories.

First a specific one I’m looking for. I think it was either at Literotica or Kristen’s Archive on ASSTR, but it may have been somewhere else. It basically involves a guy and his girlfriend. A friend of the guy or some random other guy ends up with them and pulls a gun or knife on the boyfriend and makes a deal with the boyfriend. It either goes that the guy gets to have sex with the girlfriend until the boyfriend pockets all of the balls on the pool table or the two of them play and the first to pocket all of their balls gets to have sex with the girlfriend until the other finishes pocketing all of their balls. Ends up with the boyfriend pocketing the last ball just as the guy cums in his girlfriend.

I’m also looking for any good stories that involve couples swapping wives. I’d really prefer something where two or more couples swap wives and all or some of the wives end up pregnant from one of the other husbands, either intentionally or accidentally.

Thanks.