Winehouse announced last month (Mar09) that she was desperate to reconcile with Fielder-Civil, who filed for divorce in January (09).
But now the relationship could end for good - after mother-of-two Gilleen Morris told the News of the World she is carrying Fielder-Civil's child.
Morris alleges she is six weeks pregnant after a brief relationship with Winehouse's husband in February (09) when they both attended a rehabilitation centre in Sheffield.
She says, "Blake seduced me and we had a secret fling. When I told him I was pregnant he said, 'Oh f**k!'. But he vowed to stand by me and raise the child."
Fielder-Civil filed for divorce from Winehouse in January (09) after seeing pictures of her apparently cavorting with actor Josh Bowman in St. Lucia.