Mother

I guess with movies like this, it's one or the other. But most likely the one thing you expect. So while you may not feel many surprises in the story/thriller, you may like how the tension is being build and the acting in general. It's not an easy watch, especially when and if you care for one of the main characters. Problem being you might not care that much.

So watching the wife and her husband, the question is, if you are supposed to have positive feelings towards the Babysitter? Now the ending on the other hand will either leave you satisfied because of the way everything is "wrapped" up or you may hate it for how it handled the whole thing. Not sure if it is a make or break thing though - I think you will know much earlier ...