Marc Malkin

The breakup buzz keeps getting louder for Jessica Simpson and Tony Romo. But her camp is shooting down the split rumors.

“Not true, not true,” Simpson’s rep tells me. “I spoke to Jess yesterday and the day before. They are still together.”

And while Romo spent the weekend in Chicago, sans Jess, expect a reunion any minute now: The quarterback will be Simpson’s date when little sister Ashlee marries Pete Wentz this weekend, a source tells me.

But what about those photos that hit the Web today of Romo partying in the Windy City with a mystery blonde?

There was no hanky-panky, another source tells me. In fact, the source reports, the young woman has a serious boyfriend: “She’s a doll and they did have fun at the club, but nothing happened with Tony!”