Can you recommend a romance novel where the main characters are the boss of a company and a female employee. For some reason, they are secretly married?

I'm looking for the name of a romance novel. The male lead was the boss of a company, and the female lead was a small employee. For some reason, the two of them got married. It was a secret marriage. The male and female leads led a normal married life. At first, the male lead did not take the female lead to heart. Later on, he accidentally discovered that the female lead was very popular in the company and someone wanted to pursue her. There was a plot where the male protagonist, as the boss, should not have gone to the company's department dinner, but he went and found that other male colleagues were trying to curry favor with the female protagonist.