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Child services showed up at Charlie Sheen and Brooke Mueller's home yesterday, and while it was a brief visit, it's still a bit surprising. With Brooke out of the picture for now (she's still in a Malibu rehab facility for substance abuse) why would they be investigating the Sheen household? A source tells X17online there may be issues with Charlie's behavior in addition to Brooke still struggling with drugs and alcohol.

When asked about the visit to Sheen's home yesterday, a rep for Los Angeles County Department of Children and Family Services tells X17online, "If we get a call on our emergency hotline, then the agency goes out and investigates the situation. If there's an immediate risk to a child, then action is warranted."

Charlie had his 11-month-old twin boys Max and Bob at his house this weekend, and he picked up his daughters Sam and Lola from ex-wife Denise Richards’ Calabasas home on Friday night. Whew, four kids under one roof? We wouldn't be surprised if the sitcom star had two and a half nannies helping him out!

Sheen is facing criminal charges for his bizarre Christmas Day brawl with Brooke, but he seemed to be in relatively good spirits last night when we spotted him catching a production of "The Subject Was Roses" at the Mark Taper Forum downtown starring none other than Charlie's father Martin Sheen. The Two And A Half Men star told X17 photographers he enjoyed the play, and signed autographs and posed for pictures afterward.