When my cousin was 17, she got into an argument with her stepdad after he caught her sneaking boys in. In the heat of the moment, she told him, "You are not my daddy." The sad part is, he had been the one raising her since she was about six or seven months old, and at the time, she didn’t even know who her biological father was. In a fit of anger, he snapped and slapped her. Their relationship was never the same after that. Eventually, she found her real father and now treats him better than the stepdad who had been there for her, despite the fact that her biological father had abandoned her.