The LoveInterest has noted something odd about her partner. He is gone at all hours, does strange things and never answers a straight question. Is he betraying her?

Never fear! Your love interest still has UndyingLoyalty toward you and would never do such a thing. No, it is something else. Rather he is a great patriot bravely defending his country against TheEmpire. She, of course, can't be told about this because she has no need to know. So she must wonder.

Not necessarily a married couple, of course. Subtrope of MistakenForCheating.
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!!Examples:

[[foldercontrol]]

[[folder: Film ]]

* Pretty much the entire plot of ''Film/TrueLies'' is an [[InvertedTrope inverted]] example.
* Not spies, but close enough: ''MrAndMrsSmith''
* ''TheIncredibles'': Mrs. Incredible gets suspicious when she finds a tear in her husband's old costume (and in the outtakes, what she thinks is AffairHair on his suit).
* In ''Film/HeadOverHeels'', Amanda and her friends are suspicious of Amanda's new boyfriend Jim. When they investigate, the evidence leads them to believe that he is a violent criminal. He's actually an undercover officer.

[[/folder]]

[[folder: Literature ]]

* ''Literature/TheScarletPimpernel''.

[[/folder]]

[[folder: Live Action TV ]]

* In the ''{{NCIS}}'' episode "Power Down," a young man discovers that his recently murdered wife, who he momentarily thought was cheating, was a security agent working to protect TheGovernment against cyberattacks.
* A subplot arc in the first season of ''{{Spooks}}'' involved the girlfriend of one of the agents adding two and two together to get five. (The time the agent went undercover as a married man and then forgot to take the ring off before he went home really didn't help.)
* Spy's Suspicious Daughter in ''Series/TheAmericans''. Paige, the teenage daughter of two Soviet deep cover agents masquerading as Americans, grows suspicious of her parents in Season 2 and starts snooping.
* Mary Woodhull, Abraham's wife in ''{{Series/Turn}}''.

[[/folder]]

[[folder: Truth In Television ]]

* This is a RealLife danger of the espionage profession.
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