From The Grey House:
The wolves had been here last night to scout, learned the layout, found out how many exits and how many people lived in the cabin. It was a large cabin with two floors. There was no garage; two trucks were parked behind the cabin. The scouts reported seeing three people walking around the house. This number included Natalia; she had apparently gained some freedom after her trip to The Red Thread.
Tonight, there was double the number expected. Vincent made his plans based on the smaller number but had no choice except to proceed. Most of the new people arrived two hours before Vincent and his men.