No, he legally may not, but the only way to stop him from doing this is through the courts. If she has already filed her divorce action, she can bring a motion within that case seeking a temporary restraining order (TRO), then a preliminary injunction (both are court orders, but the TRO is usually granted first, to initially stop someone from being taken advantage of or suffering losses pending hearings and a decision on the matter, then after hearings, it is solidified as an injunction). The TRO and injunction will "enjoin," or order, her husband to stop him from preventing her access to the family's/couple's money pending the resolution of the divorce, the final distribution of the assets, and the ordering of any spousal support (e.g. alimony) or child support. If she has not yet filed the divorce case, she needs to do so; then she can bring the motions and seek the orders protecting her access to the funds.She is legally allowed to bring these actions/motions herself and could get instructions from the family court (e.g. the clerks' office or website), but is *strongly* encouraged to get a family or divorce law attorney to help her.