We had a heated convo this evening. I basically told him that SD is not as perfect as he thinks she is and that I have no power in discipling her if he doesn't back me up. He told me that I need to discipline her 100% as if she were mine and I refuse..

Sd12 resents her "stepdad" (BM will never marry her babydaddy) and I do not want to experience what I've read on this site unnecessarily.