Charlie Sheen dons dumb disguise for Angelina Tracy tryst!

charlie-sheen-cheating-intouch.jpgIs Charlie Sheen back to his bad-boy habits?

The "Two and a Half Men" star, getting "treatment" at a Malibu rehab center, has reportedly been sneaking out of the facility (wearing a fake mustache) for trysts with a lingerie model named Angelina Tracy.

InTouch Weekly claims that the model is an alleged paid escort who charges $3,000 an hour and goes by the alias "Nina."

Sheen -- as you may recall -- was a former client of "Hollywood Madam" Heidi Fleiss.

In addition to reportedly bringing Tracy back to his mansion (and the bed he shared with wife Brooke Mueller (if you believe ) while she was out of town, the  actor was also spotted sneaking in and out of her Studio City home.