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With both Charlie Sheen and his wife Brooke in rehab, where are their twin boys Bob and Max?

Lisa Rinna has the answer. "Good news," Rinna Tweeted Tuesday. "the sheen babies r being well taken care of by our beloved nanny that was with us for 6 yrs. she is a god send."

Rinna, 46, and husband Harry Hamlin have two daughters: Delilah, 11, and Amelia, 8.

On Tuesday, a rep for Charlie Sheen, 44, told that the actor had "entered a rehabilitation facility" as a "preventative measure." On Monday, his wife Brooke, 32, moved from Malibu rehab The Canyon to "an undisclosed facility," according to her rep; she is reportedly fighting an addiction to crack.

Bob and Max were born in March of last year. The couple married in May of 2008 -- and made headlines for a 2009 Christmas day incident in which Charlie attacked his wife and threatened to kill her. He faces one to three years in prison for the felony menacing charge.