Peaches Geldof's sisters have stepped in to help her widowed husband care for their children.

Fifi Trixbelle, 31, Pixie, 23, and Tiger Lily, 18, have vowed to help Thomas Cohen, 23, raise sons Astala, two, and Phaedra, 15 months, following the tragic death of their mother Peaches, 25, on April 7.

A source told the Daily Mirror newspaper: ''It's really impressive how the sisters have taken on the role of caring for the boys. Peaches would be so proud.

''Fifi, Pixie and Tiger have been amazing with the kids and such a help to Tom. Everyone wants to make the boys part of a solid family unit. They were all up in London recently. It was good to see their smiles.''

The S.C.U.M rocker, who married the blonde beauty in 2012, is too traumatised to return to their marital home in Wrotham, Kent, after he discovered his wife's body slumped over their bed from a heroin overdose three months ago.

He has since been staying at his parents Sue and Keith's home in Eltham, South East London, with Astala and Phaedra.

The insider added: ''Tom's family are doing a fine job and the sisters are great. There's a lot of sitting around watching [children] TV shows like 'In the Night Garden' - things Peaches would do.''

Earlier this week, an inquest into Peaches' death revealed the mother-of-two had begun taking high purity heroin again in February after two-and-a-half years using the substitute drug, methadone.

Drugs paraphernalia - including knotted tights, a capped syringe with brown residue in the main chamber and burnt spoons - were found in the home by police at the time of her death.