Has he always baked cookies at night? If you can't talk to him about this, your best line of defense is to make sure you have things you can eat when these events take place. And if you're in this for the long haul, they will pop up all the time. My husband used to guilt me in to eating. Like if we were out and he wanted desert, he wouldn't order it unless I would. Or if he wanted to stop at the bakery, he wanted my assurance I would have some.
He's low carbing now too, so it's no longer a problem but once the people in your life see you're serious about your new WOE, they (and you) will know you can't be tempted. Good luck!