The irony? It tore Tiger apart.
"He would just call crying and say, 'My dad is with another woman,' and that would be all he could say," Dina Parr tells E!. "He would be so upset, so I just tried to be there for him and listen to him."
Parr says she dated Woods, 33, in high school and during his freshman year in college, and kept in frequent contact with him while he was on the road. Tiger's father, who died in 2006, was the athlete's closest advisor.
"My dad was my best friend and greatest role model," Woods said in a statement on his Web site after announcing his father's death. "He was an amazing dad, coach, mentor, soldier, husband and friend."
"He loved his father," Parr says. "And I know that was the one thing about his dad that he could never get over. So yeah, it's interesting that it's turned out that he's doing the same thing."
Tiger has been alleged to have had affairs with a dozen or more women, and admitted his infidelity as his professional and personal life have begun to unravel.
In a recent interview on New Zealand TV, however, Tiger said it was mother Kutilda he ruled the household, not his dad.
"You'd think Dad, being a Special Forces operator, was the tough guy. No, he was always the softie," Woods said, laughing. "My mom was tough."