The Rehab singer, 25, has been pestering the ex-Towers of London bassist to go on a bender since she got back from the Caribbean — even sending him an envelope of cash with a note reading: “Let's have some fun.”

Kristian recently rekindled his on/off romance with Sadie, 44, who has drastically cut her party lifestyle this year.

A source said: “It will not suit her if he goes on benders with Amy again. They have clashed over his partying with her in the past, and this has come at a bad time as Sadie has worked hard to settle into a healthier lifestyle. Kristian has cleaned up his act, too, but Sadie fears he could fall back into his old caning ways if he goes on a bender with Amy. So far he's refused, but Amy keeps asking.”

Yesterday Kristian, 25, was named among four men Blake Fielder-Civil claimed Amy had slept with during their marriage.

Meanwhile, her father Mitch said today that she may have a drink problem. “She doesn't drink all the time,” he said, “but when she does, it's sometimes to excess.”