Amy Winehouse had sex with her husband Blake Fielder-Civil before he was sent back to prison.

Fielder-Civil — who made a dramatic bid to see his wife on Tuesday night by breaking out of rehab and dashing to see her at The London Clinic — seduced Amy (25) by telling her how sexy she looked.

He then persuaded carers to allow him and the troubled singer — who collapsed after a drink and drugs binge 10 days ago — to give them some private time.

A source said: "It was obvious what went on — they had a farewell romp."

Earlier that day, Fielder-Civil had learned he would be returning to prison after failing a drugs test, which meant he broke the terms of his early release from a 27-month sentence for grievous bodily harm and attempting to pervert the course of justice.

A friend said: "Blake turned up in hospital and hell broke loose — everyone was totally shocked. He was asking Amy to forgive him. As he was going back inside anyway he felt he didn't have much to lose."

Following Fielder-Civil's visit to Winehouse's bedside he handed himself into police in Shoreditch, East London.

He was originally released into rehab on 5 November, but now faces going back to jail possibly until 2010.