Unless the kid has some additional needs, like sensory issues with brushing her hair, there’s no need for it to get into the state where it has to be cut off in the first place. I think RN is still primary? So it’s down to RSM to make sure she’s brushing her hair properly, not let it get so tangled that the only option is to cut it off. I mean, surely that’s weeks if not months worth of neglect. That poor kid having her for a mother. She’s a lazy and abusive vile hag.