Your new step-mother has certainly become comfortable in your home. She keeps forgetting you come home early on Fridays - you're hoping she never remembers.
Your new step-mother has a lot of power over you. Each night before settling in for bed she likes to grab you by the neck and control you to remind you who's still in charge.
Your dad remarried and your new step-mother is a bitch. In front of your dad shes a sweet little angel, but her true self comes out when he's out of the house.
Your new step-mother insists that the best way for you two to bond is to bathe together, "like a mother and son should". She wasn't wrong, and now you really are starting to get to know her better.