By Jen Heger - Radar Legal Editor
Brooke Mueller has voluntarily extended her rehab stay, and has even quit smoking, RadarOnline.com is exclusively reporting.
Charlie Sheen's ex-wife, who lives in Malibu, checked into rehab out of state after being arrested for cocaine possession in Aspen, Colorado last year.
The mother of twin toddler sons decided that at the end of her first 30 days at rehab to extend her stay because she was benefiting so much from the treatment.
"This is a dramatic turn of events for Brooke as this is the first time she has ever voluntarily decided to stay in rehab. This program she is in is working, and Brooke is getting sober for herself, and that is the first time she has ever said that. In the past, family, friends have forced her into rehab, but not this time. Brooke is taking an active role in her sobriety," a source close to the situation.
A smoker for more than 10 years, Brooke has even kicked that unhealthy habit! "Brooke quit smoking on her own, she doesn't want to do anything unhealthy to herself anymore. Her treatment team is so impressed with her accomplishments. Brooke has said instead of smoking cigarette's, she will take vitamins!," the inside says.
Its expected Brooke will stay at the facility for another month; she has been there already for approximately seven weeks.
Mueller's rep Steve Honig had no comment on our story.