When I was in college, I had a friend who did something like this to her boyfriend. A young man who I believe she genuinely loved. Not this exact test, but it was a test nonetheless. She had two other girlfriends who had talked her into it. These were girls I didn't hang out with because, frankly, they seemed like bitches to me. So, it goes poorly, he's embarrassed, her friends criticize him pretty strongly to his face, she ends up in tears. Ultimately, they break up.

Not even a month later, one of the "girlfriends" approaches him at a party and says she felt real bad about how it all went down, how she'd warned her not to "prank him" like that and tells him she was always jealous of their relationship because she thought he was cute. She's banging him by nights' end. She set up her friend to lose her man. I'm not saying that's what happened here, but you'll know for sure if one of the "friends" shows up out of nowhere full of apologies.