The following is an excerpt of a review from my site; ruledlines. I understand the flat rate offered.
"Following in the footsteps of recent supernatural psychodrama horrors, Hereditary, and The Babadook, we’re immersed in a mother’s psychological struggle. The audience is led to believe that a changeling has replaced Sarah’s son, but armed with the knowledge of the trauma that she has experienced, can we really be so sure that it isn’t the dissolution of an overburdened mind? In the wake of a ruptured familial relationship it could be proposed that the boy’s increased need for affection and concordant improvements in behaviour may be the result of an attachment disorder, and his apparent increased strength could merely be a delusion of his mother’s, who fears a genetic connection to Chris’ father. This could be paralleled to true life stories of changelings in the past, where children’s or spouse’s unwanted changes in personality were blamed on otherworldly involvement rather than being grounded in reality, and therefore leaves the uncomfortable suggestion that the real changeling could in fact be Sarah."