Cue wailing and sobbing and beating her chest. 
She has said if she buys the bowl, could we buy the guinepig and hutch for her for Christmas? "Pleeeease Because it's only fair!"
It's not happening. I can't stand guineapigs.
She phoned DH and wailed down the phone, and he suggested they go to Pets At Home tomorrow to see what owning one involves.

How long will this obsession last?
I repeat; I will not have one in the house.