When Did You Know?

While reading Proven Guilty, I knew something was suspicious about Molly Carpenter and her friends (Rosie and Nelson) because they kept coming back into the story line. I thought it was strange that Rosie and Nelson kicked their drug habits so quickly, but I really didn't have any idea how that might have tied in with all the creepy monster stuff that was going on. Eventually I kind of stopped worrying about it. Later, Harry questioned Daniel about the attack at the Carpenters' house and Molly's kidnapping. My interest was piqued when Daniel said that somehow his sister was able to hit the Reaper hard enough "with a bat or something" that he was dropped by the creature. I found it odd that Molly would a) just conveniently be able to find a spare bat lying around in a serious time of need and b) as a young, fairly small girl, would be able to bring enough force to actually hurt the bad guy. At that point, I knew something was definitely up with Molly, and I figured she was more than she seemed and probably had something to do with Rosie and Nelson quitting drugs so quickly. However, I was not completely sure that her powers came from being a wizard, until Butcher revealed it.