( I'm German, I'm tired and I have no idea how this story will develop, so please have mercy.)
Greyback observed her every move. He felt like he was wasting his time, but he had no other choice. He knew this was a test. Scabior was testing him.
It started a few weeks ago when Greyback got into a fight with one of the fellow snatchers, Sam – it got out of control and before he knew it, Greyback had bitten his throat. It would have been no big thing if Scabior wouldn't have decided to let Greyback keep an eye on her. Otherwise he would be expelled from camp which was just what the dementors were waiting for. Greyback shivered at that thought – Azkaban had been the worst place someone could ever be, even for a murderous werewolf like him. But what made Greyback really furious was that he knew it wasn't just a test if he could tame his anger and keep calm for a while – it was a punishment. He had to stay close to her, smelling the scent of her blood pulsing through her veins every second, and resist that urge to bury his teeth in that pale neck...
Greyback got rid of that thought immediately. He directed his glowing yellow eyes back to the house in front of him. It was the end of November and already dark, but the falling snow didn't damp the seductive smell that came from the widely opened window. As in the last weeks, Greyback didn't notice anything strange – not that he had expected he would. He began to wonder what Scabior was about to do with this girl. Lastly he took one last deep breath of her scent and then disapperated. Instantaneously the tents came in sight.
The snatchers' camp was basically a place of maybe a dozen small tents, surrounded by a shield of complex protective spells – it was not a nice place to be, but rather here than Azkaban.
The others were sitting around the fire and talking in a low voice. He could smell Firewhiskey. Two of the snatchers were already asleep and slightly snoring. Greyback slowly walked towards them. "Nothing.", he growled grumpily. The others looked up to him. Greyback ignored them and glanced at Scabior who was still sitting on a branch and staring thoughtfully in the fire. "Well", he finally said after a long pause "if we can't find out anythin' 'bout her, I think it's 'bout time." "Time for what?", Josh, a guy with short brown hair and a rough voice asked warily. Scabior raised his icy blue eyes and looked at Greyback who was still staring at him. His mouth formed to a crooked smile. "Time for some snatchin'."