AceShowbiz - A representative for Charlie Sheen's estranged wife Brooke Mueller has fired back at reports the former real estate agent is back in rehab, three months after her last stint. Mueller checked into a treatment facility in California in February in a bid to deal with personal issues, following her 2009 Christmas Day bust-up with her husband in Aspen, Colorado.

After a short spell in the clinic, Mueller returned home to Los Angeles, but now reports suggest she has checked herself back into a professional clinic, where she'll receive treatment for 30 days. But Mueller's rep insists the story isn't completely true, stating "Brooke is not in rehab."

"She elected to receive professional help in an area called stress management. Brooke recognized it would be in her best interest to deal with personal issues involving stress that had the potential of challenging her sobriety."

The rep has confirmed that Mueller would be at "an undisclosed location" for two to three weeks receiving stress management assistance. She dismisses suggestions Mrs. Sheen is being treated for substance abuse.