Sir Bob Geldof has been branded "Satan" by the late Michael Hutchence's mother.
Patricia Glassop, whose son was found hanged in a Sydney hotel room in 1997, claims the Band Aid founder will not allow her family to see 11-year-old Tiger Lily, Hutchence's daughter with Geldof's late wife Paula Yates.
She accused Geldof - who became Tiger Lily's legal guardian when Yates died of a drug overdose in 2000 - of being a bad father and is only raising the little girl because he wants her money.
Referring to his nickname of Saint Bob, Glassop said: "He's certainly not a saint I can't see that side of him at all. I think he is Satan.
"Whoever gets the child gets Michael's inheritance. But he can keep all the money he's got belonging to Michael, we just want Tiger."
She claims Geldof - who lives in the UK with Tiger Lily and his three daughters, Fifi, Peaches and Pixie, with Yates - rarely lets her see or speak to her granddaughter.
Glassop, who lives in Australia, added: "I think he is cruel, very cruel to keep her from her family. I am not allowed to speak to her on the phone. He's even changed the phone number."
Glassop also alleged Geldof had "no control" over his three elder daughters and claimed 18-year-old Peaches is a bad influence on Tiger Lily.
She told Australian TV show A Current Affair: "I don't think she should be Tiger's role model. Tiger knows about what she gets up to."
When Yates dies, Geldof - who recently announced he wanted to formally adopt Tiger Lily - decided it would be best for the little girl to live with him as he didn't want her to be separated from her half-sisters.