LINDSEY VONN was all smiles watching TIGER WOODS at the Masters golf tournament, but The ENQUIRER has discovered that the Olympic skiing champ is hiding dark family secrets from her new boyfriend – and pals fear it will destroy their relationship!

While Tiger grew up in a loving and secure household, Lindsey and her four siblings were mired in the middle of their parents’ bitter divorce – and The ENQUIRER reveals the stunning details after an exhaustive examination of court papers.

Sadly, the trouble began just after Lindsey’s birth in 1984, when her mother Linda suffered a stroke. Her father Alan Kildow says that his wife basically checked out of family life after that.

In the court papers, Lindsey even admits: “Mom isn’t capable of taking care of the kids.”  

The bombshell papers detail Lindsey’s tumultuous childhood as she bounced between warring parents – her mom allegedly suffering from devastating mental problems and her dad racking up a mountain of debt as well as getting into trouble with the law.

Sources say Lindsey is keeping that – and another even more shocking secret — from Tiger.

“If their relationship becomes more serious, there is going to be big trouble,” warned a source. “Lindsey is a lone wolf with no role model of a strong family or caring mother to draw on.”

The ENQUIRER is the ONLY place to find out everything about Lindsey’s disturbing past. It’s riveting reading — and on newsstands now!