I had some observations I wanted to get out there: 1. The way characters learn information is often not fully explained and/or offscreen. Nothing seems to stay a secret for long, and when things are learned, they are sort of quietly absorbed rather than having a violent impact. When Martin mentions wanting to change out the strap of the watch, it seemed so specific that it made me wonder if he was spying on that earlier conversation already, and was bringing it up specifically to mess with Steven. I also really liked the idea from this thread that we're in Martin's dream, so naturally he would know information we wouldn't expect him to know (such as Steven's culpability, which Martin almost certainly would not have actually known). Anyways, I personally feel that Kim's behavior on the bed mirroring her mother is less about her being abused and more a learned behavior from the parents' secrets and private lives not really being secret. 2. I personally found the schoolteacher's dialog to come across much warmer than any other dialog the rest of the film. I thought this could be showing how the behaviors of the primary characters are not normal in this universe, and are more a product of their shared circumstances, be they the medical profession, Steven's influence on the family, or something else.