She wanted to cry, using the mustard to let herself cry recklessly, knowing that no one would know she was sad and that no one would realize she was weak! Crying, something that seemed simple, was so difficult to do openly.
Why didn't David believe her? Why did he always side with Emmeline no matter what she said? If Emmeline said to stay, he would stay; if Emmeline said she pushed her, he would believe that she pushed Emmeline; if Emmeline said she wanted to leave, he would obediently take Emmeline away!
She admitted that Emmeline was beautiful, but could beauty cover up an abnormal heart? She had never understood why Emmeline would be nice to her one moment and then frame her the next. It turned out Emmeline had always cared about her identity as David's wife! Emmeline had already received David's love; why couldn't she be content?