I recommend playing LiarLiar 1 (and 2 if you'd like) because he's from the theatre club and particularly you might understand it a bit more.
I've tried but I can't do it for some odd reason.
I figured it out but when you go to the place where mother kills them you can't do anything about it.
I'm really confused, for the night where she takes the 3rd child you can't sleep and you have to get out of bed, the other side is blocked so I go the other way but the vase breaks either and mother finds you but nothing happens?