Whether or not a family court would find he has to support *them* doesn't help YOU: you'll still have unwanted houseguests. (The outcome of any support, etc. litigation among them does not force them to leave your home or even to pay you rent or cover bills while there--it would just put money in the wife's pocket.) You can remove them if they don't leave voluntarily, but because you have voluntarily let them stay, you have to do so by filing an action for "ejectment": ejectment is eviction for non-tenants who are lawfully on the premises (i.e. not trespassers). Only if you bring an ejectment action and get a court order for their removal (so that a sheriff or court officer can remove them) will you get them out. If you fear this will happen, don't wait--ejectment actions take months. Talk to a landlord-tenant attorney (they also handle ejectment) and start the removal process *now*.