Tana was losing so much blood. Fred couldn't take her to the hospital for fear of them seeing the mark. Such a mark could only be then by a werewolf to a human or anyone. He was scared that his secret was going to be out soon.
Without thinking much, he got an idea. He looked at Tana who was lying on the bed in pain. He stretched out one of his hands, transforming that part from his shoulder to his nails into a werewolf form and slit through her throat, separating her head from her neck and pulling out her gullet. That was a way werewolves killed their prey to avoid them from having the tiniest hope of them surviving.
Wendy, who had been eavesdropping, had already gone back to her room as she thought it was just one of their conversations again. She was feeling bored and decided to go and meet her uncle. Fred tried to drag Tana's body out but it was not going to be possible because people would know.