Amy Winehouse has sensationally admitted her marriage to jailbird Blake Fielder-Civil is finished.

The troubled Back To Black singer revealed her husband has left her for blonde German model Sophie Schandorff.

Drug-tortured star Amy dramatically confessed: “It’s over. There’s no way back for us now. It was never going to last. We were only together for sex.

“I fancied him like mad, like no one else I’ve ever known. But it’s not enough, is it?”

Amy stunned pals with her bitter acceptance that the 17-month marriage will end in divorce.

And she shocked them by revealing astonishing secrets of their wild sex life including lesbian romps and sordid threesomes.

After the couple’s recent high profile problems, with Blake jailed for violence then freed into rehab, 25-year-old Amy poured out her heart to her closest friends.

One told us: “It’s a watershed for Amy. She’s been up and down for weeks but finally accepts the reality.

“She still loves Blake on many levels but she sees there’s no future.

“She says he wants to be with Sophie—the model who made a play for him during his court appearances, mouthing ‘I love you’.

“Amy knows he’s been in touch with her and it’s almost like she thinks they’re welcome to each other.

“But she’s so furious she won’t let the girl’s name even be mentioned around her.”

The friend then revealed how Amy unveiled intimate details of her sex life with 26-year-old Blake.

“It’s been a real eye-opener,” said our source. “Amy told me they were mad for each other, experimenting all the time.

“Mostly it was Blake suggesting new things but Amy doesn’t need encouragement. They were like animals, at it all the time.

“Just like they were with drugs, they pushed themselves to the limit.

“They were into threesomes. It was Blake’s idea but Amy said she’d been with women before so it wasn’t a problem. She said she’s had a string of female lovers.

“Whenever Blake said he wanted three-in-a-bed Amy would fix it.

“They didn’t care about sharing themselves with others because it turned them on. They thought they were on this sexual journey together.

“And the pair of them were into some real kinky stuff, not just the usual bondage and sex games but really gross stuff you couldn’t mention in a newspaper.

“Amy said that was the basis for their relationship. It was built on sex so when he went inside prison there was nothing for them to fall back on.

“She’s not been to see Blake since he came out and she’s had loads of opportunities.

“Without their rampant sex life they’ve got nothing, it seems. Amy still cares about Blake and wants to help him through rehab but can’t see any chance of them getting back together.

“They were bad for each other, each pushing the other to excess, whether drugs or sex.

“Plus he sponged off her. And she’s awake to that now.”