She can try, but she has an uphill battle if the divorce has already been entered (or custody orders) wherein she already had it judicially determined that the child is his. And there's no guarantee the court would give her the child anyway, as your husband has good legal standing to maintain custody even if the child is not his. If the mother files anything in the court system, your husband will need an attorney to fight this.
Answered on Jun 24th, 2013 at 10:37 PM