The Swedish stunner, who returned with the couple's two children from a visit to her brother in China several days ago, does not want 2-year-old Sam to be separated from her dad on her birthday.
Woods, who is in Pebble Beach to play in the U.S. Open, reportedly also does not want to miss his daughter's special day Friday.
But sources said it would not be a romantic reunion -- and that nannies might take the kids to California instead.
"She hasn't decided yet," a source close to the situation told the gossip site.
"It's not like she's dying to see Tiger. But she doesn't want to keep Sam away from him on her birthday, either."