Yohane Banda, who allowed Madonna to adopt his then seven-month-old son in 2006, has admitted his concerns about what has caused the bitter rift in her family.
Speaking to The Sun, Yohane said: “Madonna and Guy’s custody battle turning bitter and nasty is a huge concern.
He also slammed Madonna's controversial behaviour, continuing: "What I have heard about Madonna’s lifestyle since her divorce from Guy sounds quite shocking.
Yohane added that he was concerned the recent custody battle would result in David wanting to live with Guy Ritchie - something he insisted he did not want for his son, explaining that he "never got the impression that Guy was interested in adopting David".
Madonna has been fighting for custody of Rocco, after he went to live with his father in London last December.
A High Court judge recently ruled that legal proceedings in England over custody of the 15-year-old son can come to an end.
While Rocco will remain in the UK for the time being, it is now thought court proceedings will resume in New York in June.
The star had already discussed the custody battle during one of her shows in the US, dedicating a cover of Edith Piaf’s ‘La Vie En Rose’ to her son, and admitting that she didn’t feel comfortable talking about it, as it made her cry.