If Brooke Mueller tests positive for drugs, or does not report for her mandatory random drug test Thursday morning, Charlie Sheen will seek custody of their 2-year-old twin sons, Bob and Max.

A legal source close to Sheen tells Breaking Celebrity News: "Charlie will absolutely ask the court to take immediate action if Brooke fails the test, or refuses to do the drug test.

"A refusal is considered a dirty test under terms of the custody agreement. It'd be up to the judge to determine, what action if any would be taken. It will take approximately 24-to-48 hours for the results for Brooke's drug test, if she did go to the testing facility and p