True Lies

From the introduction:

This world is, like most action movies, very similar to your own.

It focuses on Harry Tasker. Thought by his family to be a dull salesman, he is actually a US spy, and a damn good one. He has gotten involved in a lot of missions and big events. But in 4 years, his toughest mission will arrive as he will be tasked with tracking down nuclear missiles in the possession of Islamic jihadist Aziz. Harry's mission is complicated when he realizes his neglected wife, Helen, is contemplating an affair with Simon, a used-car salesman who claims he's a spy. When Aziz kidnaps Harry and Helen, the secret agent must save the world and patch up his marriage at the same time.