The Phoenix baby sitter who says she had sex with Kelsey Grammer when she was 15 is suing him for $20 million.

Her family filed suit Thursday, saying the actor gathered embarrassing information to keep them quiet in case they tried to publicize the relationship and falsely depicted them as driven by greed and spite.The young woman says she had sex with the star of NBC's "Frasier" in Arizona and in New Jersey two years ago, when she was his daughter's baby sitter. He was not charged after investigations in both states.

Grammer has denied her claim and called it attempted extortion.

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