That Was No Lady was the 14th episode of Season 1 of The Golden Girls TV series, also the 14th overall series episode. Directed by Jim Drake and written by Liz Sage and series co-executive producer Susan Harris, it originally aired on NBC-TV on December 21, 1985.
Dorothy embarks on a fresh new relationship. This particular relationship goes for the worse when her new boyfriend turns out to be married. And Sophia learns that Dorothy is not dumping him but seeing this man secretly.
Dorothy: Hi, Ma.
Sophia Petrillo: So you've started up with your married man again.
Dorothy: How did you know?
Sophia Petrillo: I'm The Amazing Kreskin! I was listening outside the door.
Dorothy: Oh Ma.
Sophia Petrillo: Oh - I can't put my ear to the door but you can put your ...