Nordegren's parents divorced when she was 6. Her mother, Barbo Holmberg, a Swedish politician, has been in the United States, staying with her daughter at the Windermere, Fla., home owned by Woods.
Holmberg was rushed to a local hospital after collapsing in the house Tuesday.
Her mother has been a source of support, Nordegren's friend said.
"Tiger and Elin are not doing any couples counseling at this time," she said. "But Elin is seeing someone to give her the strength to deal with all of this. And her mother has been a huge help. Last week, she was furious. But this week, Elin has too much to do."
A call to Woods' lawyer Mark NeJame for comment was not returned.