My partner and I have always been opposite of you and yours. He's the one who is never hungry and I'm the one who is always hungry.
Seems to me that if both of you are actively trying to lose weight together that you'd both benefit from separate meal times for a while, at least a few times a week, if that is what it takes to make it happen. If he needs you to cook, there's no reason you can't just cook for him and put your share in a tupperware for later.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.