The pun would have been bad enough, but she hears the squeak of the sound and it's over again. She has to shove her face into her pillow to not shriek loudly, barely managing to breathe. If she wasn't lying down already, she'd have had to sit down on the floor. If it's possible to laugh while you breathe, she's doing it, and if anyone needs her for anything else, impossible.

She'll survive, but barely.