She absolutely needs to keep going to counselling. Even if she doesn't engage, she needs to consistently understand that this will not go away until she works on it. And a space has been provided for her to do so each week/month.
She sounds incredibly like my sister when she was a child, the jealousy, the internal monologue, the never feeling good enough, feeling like she doesn't get what she deserves, someone else is getting more, being better and taking away from her experiences.
She grew up to be what looks exactly like a covert narcissist.
Obviously nobody can diagnose her but both I and our parents have been to counselling as adults (she refuses) and we've all come back to the same thing, covert/vulnerable narcissism.
She was raised in a lovely home by lovely, caring , hard working parents who did all they could for us though counselling/therapy as a child just wasn't accessible to us in the 90s, perhaps if she had had the chance to go, she wouldn't have carried that way of being into adulthood.
Perhaps not, who knows..
But my parents beat themselves up now that didn't do more about it back then.
She unfortunately has grown up to be a stressed out, overachiever who blames everyone and everything when she gets a less than perfect result, no matter what it is.
While she is married with children, is unable to really express joy or form close bonds with them, she's constantly jealous of others and trying to control her family into matching her insanely high bar as they a merely just an extention of her and her achievements. It's stressful and miserable for everyone..
We haven't spoken in 10 years.