<human>: Can you provide a brief rundown of the text in within 3 sentences?

My sister and I had a tough childhood. Our father used to hit us pretty heavily with everything that was around him, including a whip that left a lot of scars on me and my sister's body.

My scars are everywhere on my body. But I've come to accept them. I don't talk about them, but they're there. My sister on the other hand hasn't totally overcome this and she feels incredibly bad about what we experienced during childhood and her scars are toxic to her. She hates it if anyone except me sees them and I'm the only one she talks to about them (apart from her therapist). She still had a long way to go.

My girlfriend asked me a few times about them and I told her that it was from my father and not much else. She asked for details and I told her that I'd rather not relive the experiences.

Well, she noticed last week that my sister has scars too. That prompted her to seek her out today and ask her questions and details. My sister kept telling her to back off but she kept insisting for details and eventually my sister screamed her out.

I'm beyond pissed at my girlfriend right now for what she did. Not only that she kept digging into something that I'm not comfortable sharing but also what she did to my sister. My sister was completely traumatized and is very upset. I'm staying at her place tonight to make sure she feels safe.

What should I do with my girlfriend? I was ready to break up but I never make decisions impulsively so I decided to give it a little time to think it over.
<bot>: Girlfriend went to my sister to ask her details about our horrible childhood experiences and caused her to lost her shit completely. I'm super pissed at her and want to end things. Is it a right decision?