Matt Sullivan / Reuters file

Elin Nordegren is shown with her husband Tiger Woods on Oct. 8 at the Presidents Cup.

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updated 5:14 p.m. ET Dec. 9, 2009

While more details surface about Tiger Woods's reported dalliances, the golf great's Swedish-born wife, Elin Nordegren, has yet to speak about the scandal or give any hint of her distress – beyond a frantic 911 call after her mother collapsed at Woods's Florida home Tuesday.

But several sources close to the couple tell PEOPLE Nordegren, 29, was genuinely shocked by her husband's reported infidelities, and is now in deep discussions with him to see if their marriage can be saved. “She loves him and she is totally devastated over learning of his philandering,” one source close to Nordegren says. “She honestly did not know he was cheating on her.”

The same source says Nordegren questioned Woods about rumors that he was having affairs, but believed his denials. "It is sort of sad that all of the golfers knew about Tiger’s cheating throughout his marriage while poor Elin believed his lies when he told her he was not seeing any other women when on the road for days at a time,” the source says. "Now that it has hit her over the head, she is going to make the best decision for her and the kids.”

A smart, athletic student who passed up the chance to study child psychology in Sweden to become a nanny in the U.S., Nordegren tried hard not to lose herself in her husband's fame. But everything changed after Woods’s Nov. 27 car crash. Since then, says a source inside Woods’s camp, the couple have discussed the full breadth of Woods's infidelities. "She knows everything," says the source.