Anya nodded, but she didn't actually make it as far as inside. She took a few steps, and then she peered around the corner of the building and into the alley. 1) the building was easy to lean against; solid at her side. 2) she was curious. 3) she didn't have any money, having had to give up her wallet when she was arrested.
She couldn't see well in the darkness, but his fur shone and made it easy to keep him in her sights. A moment later, once he'd gone further into the alley, she followed, staying close to the wall. Anya might be unhealthy, but that didn't change the fact that she was impulsive and daring; she wanted to see him change and that was that.