`` do n't move , '' he growled , pressing his face into the curve of her neck , his fangs lightly scraping her skin . that could explain it as well . how i could n't trust her to keep mum even if i did her bidding . back in human form , she started to shake as she realized what she had done . sitting down on the easy chair , i busied my hands by petting the dog , who had come right over and rested his head on my knees . 