I view it in this manner. Elin was a 'nanny' for a former PGA golfer. She and her sister were part time swimsuit models back in their home country. While she is very attractive she isn't the type that is successful as a model, hence her gig as a nanny.
She knew who Tiger was well before they met and I would wager that even after they got married she knew what he was up to. She probably didn't realize the extent of his herd and obviously when it was going to become public, the humiliation of the whole thing took it's toll. She was after him with the 8 iron in the house, he panicked and left, probably after taking his nightly medication and the rest is history.
She will get in excess of $100 million for her trouble and lots of support for herself and the kids. I can't understand why Tiger upped the ante of her prenup, he had to know that there was no way back into that marriage after what went down. It will take a while for Tiger to get his game back if he ever does, he has some swing flaws and I don't believe he can swing as he used to with his repaired knee.