That's how I've been thinking about it too!

[ She grins a little as she says it because ? ?? a mission to have sex sounds absurd. Yet they had both fallen into that together, showing that they are even now more alike than they would have guessed. It's reassuring. She clings to it, evidence that she and Finn are still Bonded For Life. ]

Just a job that we have to get done. Another way to save the Resistance.