How does Yu Ji describe who is undercover?

Who's the undercover mistress? The corresponding word is daughter-in-law or wife. It's the spouse and the other half.

Each corresponding word has similar basic meaning and the same number of words. Each player needs to describe the words in his hand in his own words every turn (not directly), but at the same time, he should remind his "compatriots" that he is not undercover, and undercover should pay attention to himself as soon as possible and try to hide his undercover identity.