Sadie Frost is furious Amy Winehouse is trying to steal her man. The actress-turned-designer - who is desperate to rekindle her romance with former Towers of London rocker Kristian Marr - was left fuming after learning the bassist has invited the "Rehab" star to his birthday party next Thursday.
A source said: "Sadie was really excited about getting back with Kristian on his birthday. She has always loved him. But Amy turned him into somebody that wasn't appropriate for her, or her children, to be around."
Tensions between the two party girls first emerged last year when mother-of-four Sadie, 44, ended their relationship because she felt Kristian's friendship with the drug-addled singer was having a negative effect on her children.
Sadie - who was previously married to actor Jude Law and Spandau Ballet star Gary Kemp - has given Kristian an ultimatum and told him he must cut all ties with the singer if he wants to win her back.
The source added to Britain's The Sun newspaper: "Sadie told him if he has an Amy-free birthday she might consider giving their romance another chance."
The 25th birthday bash will take place at London restaurant Charlie's next week.
Amy returned to the U.K. on Monday following an extended stay in St. Lucia to work on new material.
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