Brooke left the Canyon treatment center in Malibu after documents about her stay were leaked to several media outlets on Sunday.
"Brooke has recently moved to a new rehab facility in the Los Angeles area. She wants privacy and to be away from cameras that were bothering her at the other place," a source close to Mueller, 32, tells People.
"She is doing well and can come and go and play with the kids in the park if she stays in Los Angeles. She wants to keep it together for her twins."
The source adds: "Brooke and Charlie are getting along okay, and he supports her stay in rehab."
Meanwhile, Radaronline is reporting that Charlie and Brooke are considering taking legal action against the rehab center for the leaked information.
"They (the rehab facility) are open to a major lawsuit if the The Canyon did anything like that," one of Brooke's family member's told RadarOnline. The family member did not want to be named but was extremely upset about the development.
"If the facility was anyway involved in this it is completely inappropriate and wrong," the family member added.
We hope Brooke just focuses on getting clean--for her children's sake.