Eddie Murphy is convinced he is not the father of ex-lover Mel B's unborn baby, after seeing pictures of her with another man just weeks before they started dating. The US actor was shown photographs of the former Spice Girl canoodling with a mystery man in Hawaii on May 26. Eddie and Mel began their romance in June and she claims she fell pregnant within their first month together. A source told Britain's News of the Word newspaper: "Everyone thought it was suspicious that Mel fell pregnant so quickly after getting together with Eddie."Now he thinks the same. After seeing these photos he's convinced he's not the dad. And he won't believe any different until DNA tests are carried out after the baby is born."Mel - who is believed to be around six months pregnant - was left devastated after father-of-six, Eddie, 45, announced their five-month romance had ended during a TV interview and said he would be demanding a DNA test to ascertain who is the father of Mel's child.The 31-year-old singer has strongly refuted accusations of infidelity and insists 'The Nutty Professor' actor - who is now dating film producer Tracey Edmonds - is the father.