Cat is Arya Stark's mother.

[He corrects her, stubbornly, but he drops his hand as he watches her study Nymeria. What does she see when she looks at her direwolf? How quickly could she learn to wear Nymeria's skin?]

There is a garden with places to hide--only it's larger than a garden, so large it's nearly like a forest, but indoors. My friend Nill and I might make a godswood. Nymeria would like it there--you could keep her there. I won't tell anyone.