Angry Sarah Aspin said the troubled singer had also been constantly ringing Fielder-Civil, 29.

And she even accused Amy, 27, of trying to have phone sex with him while he was lying in bed next to her.

Sarah, 31 - who has a baby son Jack with Fielder-Civil - said: "She needs to keep her hands off him. He is mine and we are a family now.

"I've had enough of her thinking she can click her fingers and get him back whenever she wants. She phones him when she is really out of it and her texts are even signed off 'your wife'."

Mum-of-three Sarah, of Leeds, met junkie Fielder-Civil in drug rehab center in 2009. She added: "I reckon Amy feels she's got to pinch other girls' fellas."

Boozed-up Amy sparked renewed fears for her health after a shambolic gig in Belgrade last month. She has told pals Fielder-Civil is the only person who can save her.

The pair wed in 2007 and divorced in 2009. He was jailed for 32 months for burglary last month.

A spokesman for Amy last night claimed Fielder-Civil had been hassling HER. He said: "She's had to change her number. He has been calling her more than ten times a day. He uses a mobile in jail."

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