«I haven’t told him anything about us»

MARGO MARY WENDICE: Let me get you another drink. Mark, before Tony comes I ought to explain something.
MARK HALLIDAY: Yes, I’ve been waiting for that.
MARGO MARY WENDICE: I haven’t told him anything about us.

Alfred Hitchcok, Dial M for Murder (1954)

http://www.tcm.com/mediaroom/video/277003/Dial-M-For-Murder-Movie-Clip-Queen-Mary.html