Anyone Else think Erika Knows What Happened to The Girls?

So I think we all figured out that the cricket John keeps hearing is some secret phone that she was using to communicate with Meg. John keeps searching for the phone and Evie is very insistent he won't find it. Looking back, Erika also seems to be insistent that he won't find it, nor is she concerned with looking for it. Nora steals the departure questionnaire for Erika and says something like "so you won't be scared .... because you're worried they'll find out your girls didn't disappear". Also, for a mother of a missing girl Erika seems to be in a fairly O.K. emotional states. And she wasn't bonding with the other mothers of the lost girls at all (again, her refusing to take the questionnaire). I don't know what the motivation would be, but doesn't it seem like she may know whats going on? Thoughts??