I'm pretty passive agressive. I'm the type to throw out snide remarks that make people feel badly about themselves and go away on their own. If I were you I would say something about like "thanks for bringing my husband food while I was gone, it's too bad you dont have a loving husband like I do to take care of you if something bad were to happen to you." On the surface it doesnt sound as bad as it would make someone who's already unsure of their situation feel.