Originally Posted by
Xenon
My initial theory still works. She loves him too much to be his friend and not be with him. So she pushes him a away to not break up the family and cause the kids more trauma. She treats him like dirt to try and convince him to move on, then is angry with him for still loving her and ruining her plan. That's why she almost breaks at the end of 9, she's too emotionally drained to keep up the facade. Easiest route to go, you never have to use Paul again, it gives her an ok but not amazing excuse for acting bad. Gets them back together fast if Felicia is not in the way.
And while i'm hesitant to put any meaning behind any subtle cues in this book, the scene at the end of 9 is not subtle and makes no sense unless MJ is not happy with her situation. And her face in both 1 and 19 are clearly meant to imply conflict and unhappiness seeing Peter. It's all right there for them to do, they just have to do it instead of BSing us for another year.