Save your circus for us.

We'll be down in a few minutes." "This is just a little private side-show of Mary's and mine," answered Rob, going off into another peal of laughter at sight of Mary's solemn face.

There was nothing funny in the situation to her whatsoever.
"Oh, don't tell, Mister Rob," she begged.

"Please don't tell.

Joyce might think it was impolite, and would put a stop to it.