Needs explicitly stated relation with (probably supertrope of?) Smithical Marriage, and after launch reduction of examples overlap
Trope Workshop talk:Spy Couple
see also Smithical Marriage
Sounds bit like Undercover As Lovers, too. It kinda cemented it for me with that "Evil Overlord" quote. Before, I thought it was just spies that fall in love and are juggling between family life and espionage. In other words, just a regular spy couple.