The divorce settlement between Heather Mills and Paul McCartney is getting messier. just one day after a divorce settlement meeting in London with ex Paul McCartney, Mills has turned down his $100 million offer (including an annual income for daughter Beatrice, 3) because he wanted her to sign a gag order banning her from speaking about their failed marriage.

"They won't be sitting down for any more talks about this settlement," a source says. "It's going straight to High Court now."

A five-day hearing is set for February.

"Heather actually said she would take half the money [Paul was offering] if Paul didn't include the gag, but he wasn't having it," the source says, adding that McCartney had heard of Mills' plans to pen a tell-all and "didn't want their dirty laundry being aired."