Truth behind love-split star Kelly Brook's reunion

By Douglas Wight

LOVESICK Kelly Brook won back ex-fiancé Billy Zane after he had a passionate fling with a sexy actress, the News of the World can reveal.

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The gorgeous model turned green-eyed after discovering he had fallen for another stunning British brunette just weeks after she ended their four-year relationship.

KELLY: Took Billy back because he was bedding another woman

Pals say she couldn't stand it when she found out he was seeing someone else, even though she was the one who broke off their engagement.

One said: "She was madly jealous and realised she wanted him back."

Secret

Kelly split with the Titanic star, 42, in February and he moved out of their £1million farmhouse in Maidstone, Kent.

They kept the break-up secret for two months and remained friends, with Billy even telling her about his new love.

Gradually, she realised she wanted him back and set about wooing him over a series of long-distance phone calls to South Africa, where Billy has been filming new movie Surviving Evil.

Pals are shocked by her decision though. The source added: "Kelly could have any man in the world. She's panicked but we feel she should have moved on. It's clear he had."