I like to talk about how to incorporate healthy habits into an existing lifestyle / relationship. We talk about situations that will be tough, and plan in advance how to work with them.
For example, I’ve reduced the glycemic index of what I’ve been cooking lately, which means that I don’t eat pasta. My husband is 1/4 Italian, and refuses to give up pasta. Knowing this, I make pasta and sauce separately and then serve my sauce over a bed of spinach and their sauce over pasta with a thin layer of spinach sprinkled on it.