Well, I'm not so sure mom is innocent, so this is a good thing.
She "cries" with very little tears. I've seen them a few times, but her face gets all red, she makes all the requisite sounds, but no tears. Yeah, yeah. I know....we all react differently. But if you're going to go to the trouble of putting all the other "signs" out there, like heaving body, red face, hyperventilating....then you should have a few tears available.
My husband took one look at her on TV and said, "Susan Smith, all over again."