From the moment the film started in the opening scene, I could tell that this girl was way too old to be playing a high school student. It felt off the entire film, especially when she smiled and you seen the crows feet around her eyes. It was hard to be believable for me from that alone. Maybe that's why her character had little to no facial reaction to hide that fact. I also don't understand how Marnie couldn't just steal from her own home I mean they looked loaded. She lives in a huge house. And the character appeared to be crying out for help for attention more than anything, so it just doesn't make much sense that she'd want to take money and leave and never be heard from again.