K.B.
I'm a little confused by this topic, so it's possible that she is too. For M., I don't understand the "pouting will NOT be tolerated" when really it's J. a child displaying disappointment or sadness. It starts to sound an awful lot like "stop being sad or mad." So I don't get the attitude that it must be stopped, when really the child needs coping skills, and needs very much to understand that the feeling underneath is NOT the problem. The kid gets to be disappointed, sad, mad, whatever it is she's feeling. Sounds like she feels it big enough to affect her whole disposition. I am not one to believe that kids are using those kinds of faces to manipulate us, they are actually having genuine feelings.
You may benefit from trying to talk about why she feels the way she does -- "when something bad happens you seem to go into a mope for a long time, what's that like?" Maybe she would benefit from some quiet time to herself when she feels that way, perhaps a "confrontation" is not her preferred route. But she needs to know that it's OK to feel upset when her mother is upset at her (nobody likes it when someone is mad at them!), don't make her feel punished for feeling it. Would a hug help, or a few minutes alone, or something else? The key is to help her find a way to cope with her emotions, not to shut them off entirely.