What is it called when you use one person to hide the real person or action ? What is that person called.?
Example: someone being investigated for cheating. He doesn't want the real woman (who he's cheating with) to be discovered by his wife. So, he goes out with his friend (another woman) often and in public... To prove to his wife that it's just "a friendship"... And that way, his wife won't look further into the real woman her husband is cheating with.
So the question is: What is the friend being used as? Or What would the noun be for the friend? What is she? In this case (the friend... Not the cheater woman)