Katherine Jackson also filed a petition in Los Angeles Superior Court today asking to be appointed guardian of the children. A hearing on the case has been scheduled for August 3. The petition cites as the reason why she should be guardian: "Minor children are currently residing with paternal grandmother. They have a long established relationship with paternal grandmother and are comfortable in her care."
The petition also states that the children have "no relationship with their biological mother." And that it is "not known" whether the mother agrees that Katherine Jackson should be guardian. As for the mother of Prince Michael II, known as Blanket, a box is checked for "none."
In another petition filed today by Katherine Jackson's attorneys, she asks for guardianship of person and estate of the three children. According to The Associated Press, she is seeking to control her son's estate in order to protect his legacy.
In her first petition for guardianship, she lists the value of Michael Jackson's estate as "unknown."
The legal filings are a possible pre-emptive strike coming from the singer's parents, who hired a lawyer over the weekend and have pressed for a second autopsy of their son.
Londell McMilan, the Jacksons' attorney, vowed on the "Today" show that the family would go to court to protect Katherine Jackson's rights to custody.
"I don't think there will be anybody who thinks that there is someone better," he told co-host Matt Lauer. "She is a very loving host of other grandchildren."
Jackson biographer Stacy Brown believes Jackson would approve of his mother caring for the kids. "I think there were only two people who would be on Michael's wish list, his mother and Grace," Brown told ABCNews.com.
Grace Rwaramba, 42, has worked for Jackson for nearly two decades, starting as an office assistant who handled insurance for his employees.
Over time, observers say Rwaramba had taken an increasingly central role in lives of Jackson and his children. Jackson and Rwaramba were even rumored to be considering marriage in 2006. In 2008 she testified in Jackson's defense during a breach-of-contract trial brought against the singer by a Middle Eastern sheik.
In an interview over the weekend with The Times of London, Rwaramba said she routinely had to pump out Jackson's stomach after he ingested too many drugs. The paper noted that Rwaramba and Jackson had a falling out.
"I had to pump his stomach many times. He always mixed so much of it," Rwaramba said, referring to drugs. "There was one period that it was so bad that I didn't let the children see him. ... He always ate too little and mixed too much."
Brown said he found the quotes puzzling. "Katherine and Jermaine [Jackson] have told me in the past that Grace was keeping him drugged up because she wanted to control him."
According to Rwaramba, Katherine Jackson told her, "Grace, the children are crying. They are asking about you. ... Where are you? Come. I will pick you up from the airport."
Mark Lester, the children's godfather, has said he would be willing to adopt the children but doubted the family would let him.
"If called to do so, of course I would. Michael has a large family. I'm sure the children will be well looked after. ... This is early days here. I extend my arms out to them, but they're American kids and I'm sure the family network will have put something in place," said Lester, who is British.