The Secret Reason Snooki Will Never Leave Her Man — Despite New Cheating Rumors

Last night, Nicole "Snooki" Polizzi adamantly denied reports that her husband, Jionni Lavalle, had a membership on Ashley Madison, where married men search for mistresses.

But a source close to the 27-year-old mother of two exclusively tells RadarOnline.com that she'll always defend her man, who was also accused of cheating last year— because she has no other choice.

"Nicole never signed a prenup before marrying Jionni," the insider tells RadarOnline.com of the Jersey Shore star turned lifestyle mogul, who is worth a reported $4 million. "Her family and friends insisted she get one, but she vehemently refused."

If Polizzi headed for divorce, ATM-owner Lavalle, 28, would be privy to a piece of her large fortune.

As RadarOnline.com previously reported, the couple, who wed in November 2014, has been on the rocks for a long time.

"They have had some knock-down, drag-out fights," a source told OKmagazine.com, admitting it's entirely possible that Lavalle has cheated. "He is frequently away on golf trips with his boys, and they go out and party."