There's also a chance it's a misunderstanding. It could be a miscommunication where someone thinks they have a right to the husband in some way, like in a property or business dispute, but they don't actually have any legal right. So it might seem like a threat when it's just a baseless claim.
It could be a fact. Maybe in a police - related matter, if the husband has been arrested for some crime, the police might inform the family by saying 'we have your husband'.