AMY WINEHOUSE's long-suffering dad Mitch is sick with worry - after finding her back in bed with her no-good ex-husband.
He went charging round after the singer's security guard told him Amy was with druggie and former jailbird BLAKE FIELDER-CIVIL.
The former cabbie, 58 - who suffers with heart problems and high blood pressure - threw Blake out of her home at Hadley Wood, North London, and allegedly threatened to "punch his lights out".
A source said: "Mitch hates the fact he's reappeared - it's making him ill. It'll force him into an early grave.
"Blake begged Mitch not to hit him when he chucked him out. Mitch was absolutely furious, he still is.
"He can't believe Blake has wormed his way back into his daughter's life."
Back To Black singer Amy's night with Blake was the first meeting between the pair in 14 months.
Our source said: "He thinks it's the worst scenario for Amy. Just when she's starting to sort herself out, the man responsible for dragging her into the gutter is crawling back into her life. Mitch is praying history doesn't repeat itself.
"He is dreading the day he finds his daughter is back on hard drugs because of him. He's worried sick."
Mitch featured on Sky documentary Saving Amy last month. In the show, he said the pair "would kill each other if they got back together".
Amy and Blake wed in secret in Miami in 2007 and divorced last month.
Blake has been in a rehab centre at Sheffield battling his addiction to heroin and other Class A substances.
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