Jennifer Lopez and Marc Anthony $350 MILLION FORTUNE AT RISK

Jennifer Lopez and 'husband Marc Anthony had a public show down on New Year's Eve , The ENQUIRER reports

The couple continues to deny they're having problems, but sources say they have fought bitterly and fear Marc's controlling ways may have stretched their 4 1/2-year marriage to the breaking point.

And insiders say if they do split, there could be a bitter showdown over their fortune, estimated to be $350 million, plus wrangling for custody of their nearly year-old twins.

"Jennifer and Marc partied in the outside lounge surrounded by a close-knit set of friends and heavy security," revealed an eyewitness source at the party.

"They danced a little bit as they stood near each other, but it was nothing serious like a long romantic dance or anything.

Then Marc's mood suddenly seemed to take a turn for the worse.

"At one point Marc took Jennifer to the side and got very serious with her," revealed a hotel staffer.

"It looked as if he was giving her some kind of orders - like a father scolding a child. It didn't look like a nice conversation. Put it this way - no one was smiling, and it was the biggest party of the year!"