Kat was petting Hekuba while she waited for Victor to open the door. She'd texted him she was bringing her step grandmother by, and she wasn't about to invite people into his home for him. And she loved Hecate, but it was always politer to just wait.
That and she was pretty sure no one wanted to find a fairly creepy person in their home. And Hecate tended to do creepy rather well.
When Victor opened the door Kat smiled, but Hecate offered no more then an impassive look. The Titan was only here as a favor to Kat.