By Jen Heger - Breaking Celebrity News Legal Editor

Charlie Sheen and Brooke Mueller's twin boys Bob and Max are being raised by their grandmother and have not seen their wayward father in nearly a month, Breaking Celebrity News is exclusively reporting.

Mom Brooke checked into an undisclosed rehab center last week and is expected to remain in treatment for at least the next 60 days. However, despite her absence, Charlie hasn't asked to spend any time with his two-year-old boys.

"Charlie last saw the boys about three weeks ago," a source close to the situation tells Breaking Celebrity News. "He hasn't requested to s