Is Divorce Looming for Tiger Woods?

He's gone to rehab and resumed his golf career, but Tiger Woods's marriage is as wobbly as ever, sources tell PEOPLE.

His wife Elin Nordegren skipped the golf star’s big comeback at the Masters and was described as disgusted and outraged by his Nike commercial featuring a voiceover by his late father. After Woods finished the tournament, coming in fourth, Nordegren flew out of Florida without her husband and their two children – they were left with nannies – for a destination unknown, friends say.

"Elin was violently angry over this commercial and thought it was a cheesy thing to do," one friend tells PEOPLE. "She wouldn't have gone near the Masters under any condition, but that just made her madder. She is over Tiger. I wouldn't be surprised if she files for divorce sometime soon."

So far, though, it's only been talk among friends. No legal papers have been filed, and it hasn't even been confirmed that she's retained a divorce attorney.

Still, another friend says Nordegren has run out of patience with Woods, taking offense with his return to golf – she had been led to believe he was going to take more time off. (On Wednesday morning it was reported that Woods has sent his entry to the U.S. Open, to be held June 17-20 at Pebble Beach, Calif.)

At home in Florida while Woods competed in Georgia, Nordegren didn't watch a broadcast of the tournament, using the TV instead for movies and videos for the children.

"She's so far beyond hurt now. If she were angry or if she hated him, they might still have a chance to work it out. But she's beyond that. She's numb. She just doesn't care anymore. She's like, 'Whatever.' Elin's not the type to get all weepy or have pity parties for herself. She mourned the loss of this marriage, and now she's moving on. It's the only thing she can do."