M: "I think your sister - don't tell her this - was a little afraid that her boyfriend might cheat on her while she was away."
N: "If she was, she already knows."
N: "There is no need to tell her. If she was afraid, she already knows."
M: "Oh, my son the philosopher."
N: (Taking a deep breath)
I have no idea how we ever managed to live in the same house.
I misunderstood her on purpose, of course.