Board Thread:Episode Discussions/@comment-3125844-20140103232138/@comment-5083222-20140119213412

At Srta - I don't think we know that Aunt Marie killed any member of Monroe's family. All we know is that they were killed by a Grimm

Not saying she (or even Nick's mom or grandpa, given the ages of the combatants) didn't but that is something for the writers to contrive for more forced drama