Esther: Kate, it's too late. It's your own fault. You took your family for granted.
Kate Coleman: What do you mean?
Esther: What are you going to do? Hit me?
When Kate, Max and Esther are in the grocery store, you can see 7Up packs on the bottom shelf. Then Kate's phone rings and when she answers it, you can see that on the shelf are 7up bottles instead of 7Up packs.
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".