I think the most concerning part was that her daughter told the teachers if you call my mum I will never come back here..
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Also I don't think she has really tried to get to the bottom of why Clementine is acting the way she is. I don't think there is a lot of emotional awareness and support from Ash with regards to her children. Like when she kept waking up and going into her sister's room.. she just tried to put that thing on the door to stop her. It doesn't sound like she actually talks and asks her why, just tries to fix the behaviours she doesn't like without actually understanding it. And I think her kids are a bit scared of her because of it.
Also I think if she actually took her toy away though her kid would feel differently. It's one thing to say it but it's a different story when you actually do it. You have to follow through otherwise they know it's all talk.