"... In return, former wife Elin Nordegren ,30, gets the biggest payout ever seen in a celebrity divorce.
But she can never publicly speak out over his alleged flings with socialite Rachel Uchitel, reality star Jaimee Grubbs, porn queen Joslyn James and up to 17 others.
A pal said: "Elin is desperate to protect the children from the womanizing side of their father.
Tiger's alleged mistresses include porn stars, pancake waitresses, bikini models and nightclub hostesses. And they're still coming! Porn star Devon James is the latest to admit to a Tiger tryst.
"Tiger's main fear is her telling her story after he's rebuilt his reputation, sending him back to the gutter."
Swedish ex model Nordegren ended up with double the sum she originally sought, after her lawyers proved Woods, 34, was worth much more than the $1billion she thought.
Her friend explained: "Elin's legal team have done a great job digging up all sorts of assets.
"The price of the huge sum is her silence: no interviews, tell-all books, or TV appearances about this for the rest of her life -- even if Tiger dies first -- or she'll lose the lot."
Woods -- believed to be building a golf resort in Dubai and investing in the Bahamas -- will be able to see the kids for up to half of each week."
This money is to buy her silence - he has secrets beyond the women that he does not want made public. Also, it is possible that the pre-nup could have stated that fidelity (his actually keeping his marriage vows - What a concept!) was part of the requirements for it to be enforced.