Is this beyond wrong?

A 💕

Ive posted about her before but my sister in law is 12. She sleeps in her mums bed every night because its "unfair" that she has to go in her own room, even though her mum doesnt want her in there. She follows her mum round the house to every room she goes to, even the toilet. If her mum is sick in bed she sits next to her cause she doesnt want to be downstairs without her, even if other people are down there. Her mum tells her to go away and she says no. I just found out her mum even showers her. Like seriously she will be 13 years old in February, I think its wrong. She makes out she's incapable of doing it and refuses to clean unless her mum does it. She knows its wrong and embarrassing because no one knows about any of this so why is she doing it? She plays with toddler toys that preschools have, and she eats baby food like the 1+year ready meals you heat up in the microwave. Its beyond ridiculous now.