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Brooke Mueller, the 32 year-old wife of Charlie Sheen, has been checked into the intensive care unit at a Sherman Oaks, Calif. hospital, TMZ reports.

This news comes on the heels of Wednesday's cancellation of an Aspen, Colo. court hearing for Mueller and Sheen. The couple had planned to ask a judge to lift a restraining order preventing them from being in contact with one another. Mueller's attorneys asked to move the hearing to Friday in order for Mueller to recuperate from surgery related to an "oral infection."

Sheen, 44, was arrested on Dec. 25 for allegedly assaulting his wife; in an affidavit, Mueller said that Sheen threatened to kill her, and brandished a knife.

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The couple welcomed twin boys Max and Bob in March 2009.