My step daughter is super passive aggressive. She acts innocent and denies doing anything wrong. Anytime that something bothers me, she will make that topic something to talk endlessly about how wonderful she thinks it is. It's so annoying, usually I just ignore her and roll my eyes. Of course after 20 minutes of hearing how happy she is, she tells me I'm too picky, or I never like what everyone else loves. If it's something that I love she will do her best to cause some kind of issue with it. In January she pushed me too far. I had a mental break down and cried all day everyday  for two weeks. I even contemplated suicide.  No I'm sorry. Just giggles and blaming others, even me instead of owning the situation when confronted. I was done with it all. I texted her that she  is acting like a monster. Does she really want to cause me to divorce her dad, causing him to become depressed, when he is mourning the death of his father, a time when he needs me the most. I really was about to do it. But that didn't elicit better behavior or an apology either. 
One day I stopped crying. I decided she's not going to be the cause of my marriage ending. From now on, I will not be doing her chores for her. She had not done any chores in 4 months and her chore is to load the dishwasher after lunch. Which she never did do after lunch, it was always at midnight when she decided she would do it, if pressed to do it. So I waited until 10, and told her hey, it's 10 and the dishes are not done. Do it now. We don't really cook, so dishes means 4 plates 4 cups and 4 forks. And wouldn't you know it the next day she didn't do it either. So again I told her at 10 to get off her butt and do her chores. And the next day the same thing.  This time she was in her room pretending to be asleep when I saw she was on the computer. Again I told her it's 10 the dishes aren't going to do themselves.Get to it. Yeah. No more doing it for her. She had the same chore for 5 years. It's not new. I don't need to ask her sweetly if she can please do it. She knows it is expected, her responsibility, and she is supposed to do it every day without needing to be told to. And the next day child social services comes over. Apparently she is suicidal and I'm emotionally abusing her because I called her a monster. Even tho she called them that very day , as they asked about me shining a light in her sleeping eyes while she is sick. All I did was turn on the overhead light when she was faking asleep. Unless her computer automatically sends messages on its own just seconds before turning on the light. (Shakes my head). being told three days in a row to do her chores isn't a real sickness. No cough, no fever, no mention of being sick, until the social service comes and says she is. No call to them when I told her she is being a monster, but three days of chores... it bothers her all of a sudden.