He is oversharing with his daughter

[Rockofblue]

My partner worked away for a few months. I gave him a book I had filled will personal thoughts and poetry to ease the separation. At time he was really touched.
I was unable to visit but his adult D did, and I just discovered she wrote in the book suggesting she read my content. What upsets me is it was private, I dint have any relationship with her (she sells story to press and can't be trusted having caused huge trauma to lots of family in past).
But her dad keeps forgiving her and I would like advice on how to raise this with him. He knows I am a private person and she plagiarised him in the past but he is just not realistic about her. I accept that but AIBU to feel this really crosses a boundary. When I try to talk to him about being guarded with her he gets very angry and defensive. She is in her twenties. How do I make him see his lack of boundaries with her leaves me betrayed. Or am I over reacting?

It's kind of up to him whether or not he shows other people his personal stuff.

At least you know not to write personal notes for him anymore. The fact that she wrote in it suggests she's possessive over him.

How long have you been together?

she sells story to press

What’s that got to do with anything? The press won’t be interested in some stuff you wrote in a notebook to your partner, even if your partner is somehow famous.

she plagiarised him in the past

What an earth are you talking about? What did she plagiarise?

You have every right to be pissed off. I'm sure you wouldn't want anyone reading your personal messages to him so it's not just about his DD doing it. I would say that so it doesn't just seem like your attacking his DD which he'll probably get all defensive about.

Just say something like, "you know those notes I wrote were for your eyes only. I don't appreciate you making them available for just anyone to read."

When you say she plagiarised him, what do you mean by that?
It's clear he needs to know that your notebook was private and only for him.
It's a shame you and his daughter can't try and get on. But just avoid sending him anything you don't want others to see.

Thanks, good advice. 👍

Yes, I thought that, I am not even sure he is aware, I was planning to add a new note for summer, how I came across it. Yes, she is very possessive and at least he acknowledges that.

Together over 10 years. Started fine but she did press stories a number of times over the years to promote herself and lied about no contact with her dad. I think maybe punishing him as at time she was visiting quite regularly. Even his counsellor advised no contact with her but not easy for him to do. (Breakdown after her second press thing)
Plagerised - he wrote bits over the years for her which she passes off as her own. Not unusual for family, but at same time she claims no contact and demonised him to gain some kind of press sympathy.

He isn't nor has any ambition to be. She isn't but huge ambition to be. And few scruples about how. But since it hasn't happened yet unlikely to. Its more he doesn't know that and took a risk with my writings.