Alcoholism

My husband is a recovering alcoholic. He’s been on the journey for the better part of almost 4 years now. He can be really good for a while but occasionally he will have a drink. He hides/tries to hide it from me and is extremely defensive when confronted. He does have a counselor and does group counseling and I know he’s trying but I just feel like I’m at a loss here. Last time it happened, he denied it until I showed him proof. We talked it through and had a productive conversation. I suspect him of drinking tonight and if I confront him I know we will get nowhere. Does anyone have a S.O struggling with sobriety and could offer some words of wisdom?❤️