It's the pet name that's the last straw, a delusion she's clung to so dearly for so long. To hear it in this context with these thoughts beating against her skull sets her sobbing, distantly aware she's verging on hysterical in her irrationality and not able to do much about it. "You love her so much," she says, almost incoherent. "You — I knew that, I always — I should have known that, but you love her so much and I can't... I'm not, I'm —" She shakes her head, lips pressed into a line as she tries to keep it all in, words and tears and breath, until she can get her heart to beat right again.