I don’t share everyone’s pessimism. I think she will come through this eventually.
Whatever else she’s doing, she clearly has an exercise regime, so there is discipline there.
She says she uses dance to work through things in her life. What might be distressing for us to watch (and it is hugely distressing) may be an exorcism for her.
We don’t know what gets discussed between her and her psychiatrist but I hope she finds peace.