I feel like if, near the end of the, when Milo's character goes to the female leads house, he just straight up tells her that when he told her he was a criminal, he wasn't lying, and she reciprocates and tells him that she wasn't lying when she said she was in the CIA, and then, from there, they build a pretty open and honest relationship, it'd have lead to something more interesting than what they have going on now.

I think that'd be a way better angle for the show than another "will they/won't they find out" angle.