Hmm. Yes, making kids into emotional partners is A Thing. It's actually pretty common, but mostly amongst parents who have already divorced from one another and/or were always single parents. It's most common with mothers and sons and fathers and daughters. My H did this a little with his teenage daughter until I pointed it out to him. It largely stopped, until before BD when he was triggered into some sort of emotional regression.
I can't link you to materials due to DB policy of not promoting other materials, but typing the following into a search engine comes up with several helpful results: parents turning opposite sex child into emotional companion.
There's an icky term for it: emotional incest. Usually the parents who turn their kid into their partner have issues, like a personality disorder.
