seeking college cuck story

Hi everyone--years ago I read a story about a nerdy guy in college whose gf ended fucking his jock roommate after they tricked him into thinking she was pissed at him at a party--very hot story. Anyone know where I can find it? They kind of set up her bf at the party, made him jealous so he yelled at her, she stormed off then his roommate followed her and fucked her.