Madonna and Guy Ritchie's marriage will fail if they adopt another child, according to the film director's father.
The Material Girl is reportedly looking to adopt a baby girl to add to her three-strong brood, but Ritchie's father John believes the extra pressure could seriously threaten the couple's relationship.
John insists son Guy is a perfect father to Lourdes, 10, Rocco, 6, and Malawian David Banda, 1, but admits the couple are going through a difficult patch.
He says, "They've had a difficult time. (David) is beautiful and Guy is very good with him. But I don't think he'd want to adopt again.
