"Well," she has to chuckle, "you're not a bad person to hide behind. Very broad back." Hey, she's not going to fault people to hide behind others. She's hidden behind her sister more than once.

When an angry werewolf advances towards you, you really don't want to stay were you are, and there's nothing better than another werewolf to hide behind to deal with the situation. Assuming you know that the other werewolf will protect you, anyway.