She can be as angry as she likes, it doesn't change the fact that there are things she needs to do, and you don't do her any favors when you give in. My DD is 13 so we haven't hit the hard core moody judy's yet, but I like to use language that turns it back on being something that she needs to do. Like, "This is a valuable life skill" and "This is a part of basic self-maintenance that every person has to do". I also don't buy the "I forgot" excuse either. Thinking and planning around basic self-maintenance tasks (and yes that includes making sure your home and clothes are clean and your library books are returned) is something that every successful person does without making a fuss about it.