Just a day after Usher's eldest son, Usher Raymond V, was hospitalized after his hand got stuck in the swimming pool drain, Tameka Foster, the rapper's former wife and the mother of his two children, filed for custody in a Fulton County, Ga., court on Tuesday, TMZ reported.

Foster has filed for an emergency hearing saying that Usher has created a dangerous growing environment for his two children, and that the rapper is not taking his parental duties seriously. She also claims that the people Usher entrusts the task of caring for their children -- Usher V, 5, and Naviyd, 4 -- are not adept at their jobs, TMZ said, citing court documents.

Reportedly, Usher's aunt, Rena Oden, was taking care of his children when the accident took place on Monday. The five-year-old was trying to retrieve a toy from the swimming pool when his hand got stuck in the drain.

Although Oden tried to stop the boy, she had to call in emergency service personnel who gave the boy CPR and rushed him to the hospital. Usher was not home when the accident occurred, but TMZ reported that he arrived soon after he was notified of the accident and accompanied his son to the hospital.

According to TMZ, Foster has, on more than one occasion, complained about Oden, and once alleged that the woman let a stalker into the house where Usher was staying with the children. Foster is also said to have been unhappy with how Oden disciplines her children.

When Usher and Foster got divorced in 2009, after two years of marriage, he was awarded primary custody of their children following a long, heated custody battle, where Usher pointed out that Foster was mentally unstable and was not capable of forming an emotional bond with the children.

He also claimed that she interfered with his time with the children, a charge that Foster denied, reports at the time said.