On Monday's Today show, the Jacksons' attorney Londell McMillan said there isn't "anybody who thinks that there is someone better" than Katherine Jackson to have custody.
Said McMillan, "She is a very loving host of other grandchildren."
Over the weekend, Katherine was spotted at a Los Angeles Target stocking up on toys, sleeping bags and other supplies.
McMillan added that the family hasn't heard from Rowe, who gave up her custody rights to the children after she and Jackson divorced in 1999.
In a statement over the weekend, Rowe's attorney, Marta Almli, said: "Ms. Rowe's only thoughts at this time have been regarding the devastating loss Michael's family has suffered. Ms. Rowe requests that Michael's family, and particularly the children, be spared such harmful, sensationalist speculation and that they be able to say goodbye to their loved one in peace."