Brooke Mueller left the Betty Ford Center for another rehabilitation center but Charlie Sheen's ex-wife has been declared unfit to care for their children even after her next release from rehab, TMZ reported Friday.

Sources told the site that Mueller  notified the court that she would like to take custody of her 4-year-old twin boys, Bob and Max, when she leaves rehab in the next 60 days. The children are currently in the custody of Denise Richards, Sheen's other ex-wife and mother of his two daughters, Sam and Lola. However, officials from the L.A. County Dept. of Children and Family Services are frustrated by Mueller's declarations that she has been cured from her addiction. Mueller has been in rehab at least 20 times, including for abusing crystal meth while pregnant with her sons.

The entertainment site reported that DCFS filed paperwork to block any attempt Mueller makes to regain custody of her children. The agency would like to maintain the current status quo and have her monitored until she can prove her fitness as a parent. Sheen is allegedly on board with Richards maintaining custody of his youngest children.

In May, the twins were removed from the care of their mother amid allegations that the kids were not safe. It was speculated that Mueller was abusing drugs again and officials from the court intervened.

"Brooke was given many opportunities by social workers to clean up her act. Social workers felt that Bob and Max weren't safe in Brooke's care," a source told RadarOnline. "The decision was made late on Thursday afternoon, and the boys are no longer in Brooke's care."

Mueller entered rehab that same month, but has spent much of her time attempting to wrest custody of her sons from Richards' care. A judge denied her request in May.

Tags: Brooke Mueller Charlie Sheen denise richards