Requires FFM 3p: Two hot coeds are competing for the last remaining open slot in the campus's most notorious and naughty but popular sorority; both desperately want to get into this exclusive club and will "do anything" to achieve their goal. They compete in some sexual way to be the one. Possibilities include the guy (BF of the sorority's president or whatever) using toys on each of them in a competition to see which can take it the longest without cumming or can just tolerate it the longest without giving up. Or they alternate giving the guy a BJ or FS for one minute at a time, switching each time a minute passes; the one who makes him cum wins. Or the girls do each other in some way (69 or vibes or ...) and whichever one cums last wins or calls it quits loses; guy watches (closely!). Lots of other variations possible.
As noted by others, most even moderately normal 2p role plays have become almost clichéd, but 3p opens up lots of other options.
@Troilist - If it is just going to be you and your husband, I guess my "entry" doesn't qualify for your "contest", but your screen name gives me hope that a 3p might not be out of the question.
-Ww