(TMZ) A stressed out and seemingly desperate Brooke Mueller was seen walking around Maui this week ... engaged in conversations with random people in cars ... while clutching a wad of cash in her hand.
Brooke was in Hawaii with her two little kids -- no word on where the children were during Brooke's outing.
Brooke had recently struck a custody agreement with Charlie Sheen -- who seemed unhappy with the arrangement after Brooke entered rehab back in April for substance abuse issues.
TMZ contacted Brooke's people who refused to comment on the situation. more on this story