Brooke Mueller is having a tough time

The ex-wife of Charlie Sheen apparently seemed “stressed out and seemingly desperate” as she was seen walking around Maui this week engaged in conversations with random people in cars while clutching a wad of cash in her hand.

According to TMZ, Brooke was in Hawaii with her two little kids.

Mueller — who  has a long history of substance abuse issues, and has been in and out of rehab several times — recently struck a custody agreement with Sheen, who seemed unhappy with the arrangement after Mueller entered rehab back in April for substance abuse issues.