How we cite our quotes: (Chapter.Paragraph)
Quote #1
You make me feel bad; feeling bad makes me mad; ergo, you make me mad. […] So I blamed me, and he blamed me. (4.19)
This quote early in the book is a good introduction to the reasons for blame. Kevin ignores Eva and makes her feel bad. Therefore, she gets mad at Kevin. She blames him for problems in her own life, and he blames her for treating him coldly. It's a cycle.
Quote #2
"It's too late for second thoughts. Never, ever tell me that you regret our own kid." (6.80)
Franklin shames Eva into not voicing regrets, which makes her internalize them and feel guilty about them. Society already expects mothers to love their children unconditionally, and Franklin reinforces this. The guilt only makes this regret worse.
Quote #3
I seem to be laying the groundwork for claiming that Kevin is all my fault. […] Blame confers an awesome power. […] Blame conveys clear lessons in which others may take comfort: if only she hadn't—, and by implication makes tragedy avoidable. (7.4)
This is the root of Eva's conflict. Is she to blame for Kevin's actions? As she says here, taking the blame gives her a sort of power. Without blame, she is powerless.