I think, too, that she is what a lot of mothers are when it comes to their children; Naive and dillusiional--both of the parents actually. This was most evident when the grandparents came to town under the "December 3, later" section. It states, "Mom and Dad took turns talking, just as they had at the meeting. Grandmom and Grandpop didn't seem surprised by any of what they heard. They took it all without even blinking." "When it was over, when we had told them every bad thing there was to tell...Grandmom put her hand on her heart, sighed deeply and said, '"You know what I'm going to tell you, Caroline...you're paying now for what you didn't do back then..." The grandfather, retorting the Dad's attempt to protect Erik again, stated, "Wedidtell you so. Erick did need help. He needed a doctor's help." The father's reply shows that he and the mom, both, were in denial about the needs of their son: "No. Erik did not need a doctor's help. He did not need drugs. He did not need to be one of those medicated kids who float around all the time like they're underwater."
Unfortunately, the they clearly ignored the fact that Erik had a mental issue that needed to be cared for. Ironically, some parents in real society seem to overmedicate. The difficulty is trying to find a balance.