Heidi Montag is threatening to sue if Spencer Pratt releases a tell-all book. Heidi is so worried over what Spencer may spill on their past that she is threatening now, before the book is even finished.

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More pictures of Heidi and Spencer after the drama…

Is there ever a time when there isn’t drama between these two?

TMZ has learned … Heidi Montag is downright furious with Spencer Pratt’s new claim that he plans to write a tell-all book about her private life — and is now threatening legal action to stop him.

We just spoke to Montag who tells us, “This is exactly why I left him … Right now I’m looking into my legal options.”

Spencer had told Us Weekly that he plans on spilling everything about his relationship with Heidi Montag — including new details about her tormented relationship with her mother, Darlene Egelhoff.

How long will we have to listen to the drama go on between them, even after they are divorced? Would you be interested in reading the book?

Photos: Fame

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