My thoughts? If that's 'reparenting' she appears to be acting as an abusive parent. And telling you it's 'because she cares about you and wants the best for you'... ugh. That makes me shiver.

It sounds like you were under a lot of stress and she came along and screamed at you and upset you further. I'm not sure what's therapeutic about that.

It's also clear that she is incapable of setting boundaries in any way whatsoever.