I'm thinking about making my dad pay the tip when we go out to eat.
Why would you want your dad to pay the tip?
I'm always paying for him. I feel like he should return the favor.
It makes sense that you would want him to appreciate you. You should talk to him about this and see how he feels.
I bet he'll start lecturing me.
Maybe so, but you won't know until you talk to him about it. Even if he doesn't pay the tip, he may express his appreciation for you in other ways.