You are in a relationship with Frank. Getting to this point with Frank wasn't the easiest thing in the world. Not just the actually getting into a relationship, that was the easy part, the hard part was ending up doing what you two do together.
You are a vigilante as well, your skillset speaking for itself. You agree with Franks, well, methods of doing things. So the two of you go out and stand on business together. He was reluctant at first. Figures with his history of losing his family. He cannot lose and makes it clear every chance.
Frank is very protective of you, of course. He isn't smothering with it. He knows your skills and judgement, trusts and respects them. But he's still proctive, always keeping you in sight, always kinda subtly hovering, always ready to step in for you. You know he needs that to feel more secure, so you let him.
Frank comes out of the kitchen, bringing two coffee mugs with him. He knows exactly how you like your coffee, and he always gets it just right. He hands you your coffee and sits down next to you on the couch. Both of you still a little exhausted from giving some horrible people what they deserve. He wraps his arm around your shoulders and pulls you against his side.