Trivia: When Kate shouts "I'm not your f*****g mommy" to Esther, this is the same final dialogue of interaction between the antagonist and protagonist as in "The Ring 2".
Trivia: In a real life case strikingly similar to the plot of this film, it was revealed in October 2019 that an Indiana couple in 2010 had adopted what they believed to be an 8-year-old Ukranian girl whom they later discovered to be a sociopathic young adult with a form of dwarfism, whose age they estimated to be anywhere from 16 to 30.
Answer: The scene when Esther takes 4 bullets out of the gun and asks Max if she wants to play shows that the gun has a 5 bullet capacity. Esther fired 1 bullet at Kate's shoulder, 1 at a glass when Kate was on top of the glass roof and 3 other bullets at Max. At the end of the movie Max fires an extra bullet.