Gisele To Become A Stepmom?

Gossip site TMZ ratcheted up the buzz yesterday, reporting the injured Patriots QB proposed to his supermodel girlfriend on a private flight from Teterboro Airport in New Jersey to Boston on Christmas Eve.

Her parents were reportedly along for the ride, along with four dozen white roses and some bubbly. The site reports Brady was nervous before he popped the question, but - of course - Gisele said yes.

A source close to Brady also said yesterday he heard the engagement is a go.

But if it's true, Tom Brady Sr. says he isn't in on the news. "We don't know a thing about it," Tom's dad told us yesterday. "Nobody told me. We talked to him and there's nothing to say. It's rumor, rumor, rumor. It must be a slow news day."

Tom has a been dating Gisele since 2006. He has a 1-year-old son, John Edward, with actress Bridget Moynahan.