He says they were "together" while she was with Jionni (her boyfriend). She VEHEMENTLY denies it all and says he's lying about everything. Neither is budging, and it's hard to decipher who is telling the truth. Each has a motive to lie:
- Snooks loves her boyfriend and will lose a relationship if it comes out that she cheated
- Situation has status to gain via a (fabricated or real) Snooki love storyline since her star status is head and shoulders above all the other Jersey Shore stars
When Ronnie brings up the rumor, JWOWW's face reveals that she immediately recognizes the story as if she already has prior knowledge of an incident between Mike and Snooki. She then goes to tell Snooki and says something to the effect of (paraphrasing) "Mike told everyone what happened between the two of you" - MEANING SOMETHING DID HAPPEN. AND SNOOKI REACTED IMMEDIATELY - instead of saying "what happened between me and Mike?" she started flipping out right away. Innocents don't react like that, dontcha think?
So there, problem solved. YOU'RE WELCOME.