My 13 year old step-daughter hates me. She hates her Dad because he sides with me. She hates my son and my daughter. But she does not hate her older sister (my oldest step-daughter). Our household is in constant termoil and she just keeps getting worse. We can't look at her, we can't talk to her. We can't include her and we can't exclude her. She does what she wants and she genuinely acts like she enjoys all the negativity. The week of Christmas, she sucked the joy out of me. I have been with my husband since his two daughters were 2 years old and a newborn.