No effing way I will live with or near active addiction in any form if I have any choice in the matter. All I have to do is think back to that darkness and the trouble I caused in relation to it... recoil as from an open flame.
If my wife relapses then I think my short-term response is either she doubles-down in her program (red-alert time I sure will be doing that in mine) and it remains an isolated event, or one of us moves out and our daughter stays with me.