I strongly suspect that Monty Python 50th Anniversary 1969 2019 signature shirt. As such, I suggest you do not allow yourself to be used. Tell her only once – your relationship is over and so should the contact be over. You are not interested in the friend zone or getting back together; and ask her not to contact you again. It sounds harsh; but believe me, it won’t dent her armor. It will save you all sorts of grief. Good luck, friend! You can’t really intervene in their relationship, but you can take care of yourself. Process your feelings with your parents, if they are open to it, and they don’t try to pretend things aren’t happening that are happening. That probably means you’ll get more reality from your Dad than your Mum, since she’s in denial. When people are in denial, you can try to get them to talk about the situation, but most likely they won’t talk about it realistically, and if you try to share your experience, they are likely to deny that, too.
Still, it’s worth trying to share your Monty Python 50th Anniversary 1969 2019 signature shirt, but don’t be surprised if you get gaslit and told that what you experience isn’t really happening. If you are getting gaslit about it, then it’s not worth trying to insist on sharing your experience. That will just get you shut down, over and over. It exacerbates the pain you’re in when a parent denies your experience. Then, the best way to take care of yourself is to talk to someone else. It could be a friend, or, I suppose, a therapist, if you have access to one. Also, it might be possible to talk to your Dad. However, he might not be good at listening, either. I wouldn’t know, though, since I know nothing about your family. I can only point out some of the more obvious possibilities, but without knowing more, there’s little I can say that will be useful.