Many Reflections of a Storm by Delilah Dare

An air god, his pet werewolf, and the changeling woman they steal from the mirror.

Stormy is still swallowing when our obsession leaves her pleasure party. Luckily for us, it’s a rainy day in her realm, and we follow her all the way home through reflections in puddles.
Only she doesn’t go home. She goes to a male’s apartment. Within five minutes, she’s crying in the bathroom.
I’ve had enough watching. I need to comfort her, to scent her, to add her to my collection of rare pets.

“Do you want a pet of your own, Wolfie? Are you ready for the responsibility?”
“Yes, please, let me have her!”
“Very well. You deserve a treat, my big, bad rainwolf.”