"Oh, help," said Jennifer, "what is it this time? Some footling little thing you've got, and you expect us to get all worked up about it. You two are always getting excited about nothing. And do sit up, Mike - you look awful leaning over the table like that."
From VENTURE TO SOUTH AFRICA, Chapter 3, Cheering Up Jennifer. We can see that Jennifer really needs cheering up. She's definitely Jane Shaw's grouchiest character.