^^^What Steve said. And if and when you do confront her, there is no need for lengthy explanations. Short and simple. There is nothing that has more impact than a brief statement such as "I know what you are doing and it is unacceptable." Queue the gaslighting. "What? I'm not doing anything, you're paranoid. What is this "evidence" that you think you have? Maybe you're the one having an affair! I bet you're doing this to try and cover your own guilt!" Don't fall for it. "I don't need to explain, I know, and there's nothing more to say." Then walk out of the room.
