I’ve noticed this about older generations. Part of me feels like it’s someone who doesn’t know how to be affectionate or has a block when it comes to showing loving emotions. Which is super common especially if they themselves have grown up without receiving affection or loving words. I genuinely would view this as a reflection of her internal self. And it’s being projected. Many reasons for this I guess but it’s not to justify it, it’s horrible to hear this but maybe having some kind of understanding can help view it differently so it’s not being absorbed and affecting you as much. You could also try responding opposites like ‘he cry’s because he communicates with his mama’, ‘he needs comfort and love’ etc just to see if this changes anything. Her beliefs might come from something she was also told as a mother.
Not normal. If she keep going even if you told her not to, I would put some distance between your family and her. If she get surprised, just remind her you ve asked her to behave and she just trespass the boundaries. Those comments are mean as fuck. What is she gonna do when your lo will understand them ??? That's not ok