Brooke had her kids taken away from her by the Department of Children and Family Services because of the unsafe environment her drug use presented.
With their Anger Management star dad's approval, they were placed with his second wife, Denise.
As RadarOnine.com has reported, Brooke has unsuccessfully tried to get an L.A. judge to remove the boys from Denise and place them with her brother.
Sunday will be the first time she's seen Bob and Max since she was placed on an involuntary psychiatric hold at UCLA Medical Center on May 1.
After being released from UCLA, she checked herself into Betty Ford. It's her 20th time in rehab.