I am trying to remember this movie-I only saw the extended preview. It was a kids birthday party of something in the opening, and there was treehouse. Something about whispers maybe? One kid ended up luring the mom up to a treehouse and pushed her out. It hasn’t been out that long. I remember her making the kid a sandwich or something in the preview. I know this is random and not very descriptive but it’s driving me crazy!
It was a short-lived TV series called Whispers.
Oops- It was “The” Whispers. One season on ABC in 2015. http://www.ismyshowcancelled.com/show/2015/the-whispers/
Here’s the part with the treehouse: https://www.youtube.com/watch?v=JrpAPgLqOQc