As they walked through the streets of London, Sirius began to notice that the houses around them were looking more ... well... upscale. He couldn't imagine this woman living in an extravagant house - that is until the walked up to the front door of one. He couldn't help but be unsettled. Not many people were allowed to keep homes like this. If she was a witch and still lived in a place this nice... well Sirius didn't want to think too much about that. Maybe she just knew someone.
The sight of the house elf only confirmed this. The thing reminded him of Kreatcher, that rat. They had the same bad attitude too. No house elf treated its actual master that way, so she must have been a friend of someone high up. He made a note to himself to find out who it was before they arrived. It would be bad if his dear sister came by...
He wagged his tail and followed her into the house merrily. He could hardly wait for food, though he hoped the house elf wouldn't spike it. He had never put if past Kreatcher, after all. Sirius reminded himself to chase this Nigel character around the house sometime soon to put him in his place.