The singer rowed with film director Reg Traviss after a burlesque stripper claimed to have been seeing him, reports the Mirror.
Raven Isis said that the pair were "madly in love" and that she had dumped him only days before.
"Amy was fuming with the stripper and is not one to take things lying down, if you’ll pardon the expression. She wanted to know from Reg exactly who this 'bird' was as she won’t be taken for a mug," a source said.
"Reg insisted he was innocent, and Amy heard him out. She’s sticking by her man," they added. "She had better not come face to face with the stripper though. It will be war."
Friends said Traviss was amused by the 25-year-old's claims, made in an interview with a newspaper.
One added: "It’s nonsense. They split up ages ago, but Raven has refused to accept that he’s with Amy now. He is adamant that he has never two-timed Amy with her."
Winehouse, currently working on her new album, has apparently asked the director to move in with her.
