Season 2, Episode 2 "The Psychiatrist"
As Basil tries to prove that Mr. Johnson has a girl spending the night at his room, he goes up a ladder to try and see said girl through the window. When Sybil, his wife, hears that he's "trying to see girl in room" from Manuel, she instantly thinks he's trying to look at a busty young girl that is also spending the night at the Hotel, whom Sybil thinks Basil has a particular sexual interest in.

Madness and hilarity ensues.