It’s really kind of you to take care of such a hard task! I wasn’t criticizing you. But I still think if someone is so afraid/concerned/etc. about other people touching their food, to the point where they can’t eat *anything* other than home-cooked meals, that’s a bit too far. I’m not a psychiatrist, but that sounds like an eating disorder, or perhaps a compulsive disorder (https://en.wikipedia.org/wiki/Avoidant/restrictive_food_intake_disorder).
Regardless, it sounds like it’s putting you into an impossible situation. I hope you two can get some help so you *both* can be happy with your meals.