Normal, rational people aren't baby murderers. You can't equate what you would do, to what she would do, because you wouldn't have murdered the babies in the first place. If she is guilty, why do you think she'd suddenly develop a conscience after something so coldblooded? Like yeah I'll murder your child and irreparably break your heart forever, but don't worry, I'll save you some pain and admit to it? Makes no sense. People usually only do that when they have something to gain i.e. reduced sentence, she doesn't.