So my girlfriend of 10 months just threw a fucking curve ball at me. She's admitted in the past (it was roughly 10 years ago) that she had cheated on a long term partner because she was unsatisfied with him. I brushed it off because she made it seem like a mistake and AWALT right?

Cue her now feeling terrible & saying shes a better person despite never revealing to the partner at the time that she cheated on him.

"I was young and very unhappy....I'd been with this guy for 6 years and I didn't know how to end it....I'd known I was unhappy for a long time" her exact words.

The problem is, she made it sound like it was a one time thing. She actually said "I've only cheated once" I guess this is what they call trickle truth because when I pressed her further she goes on to tell me the full story.

Turns out it was her brother's friend and it happened more than ONCE. They met up roughly around 3-4 times behind this poor guy's back. Her excuse being "my partner started feeling like a brother to me"

Now, after digesting the Red Pill, I'm sat here wondering why the fuck I am LTRing this woman. Once a cheater always a cheater right? She says and swears that she will just end it if she was ever that unhappy again. But alcohol + impulses.

Cue Girls Night Out this weekend. Cue how much her cousin is a single past the wall sloot and how the clubs are a meat market. What are my options here? I can't outright tell her not to go out. I feel like I cannot trust this woman. The cheating story has got to me big time.

She's not done anything for me to distrust her but then what happens behind closed doors... Is dump the only option here?

Should I just follow Rollo's advice (https://therationalmale.com/2012/08/27/girls-night-out/) and let her go without bringing this up?

My issue is that I do not want to be fucking cuckolded if this woman is capable of cheating and never telling her partner. Right now, I feel almost betrayed by her trickle truth. Cautious at first but now I know the full story I feel almost led on and that I cannot believe anything that comes out of her fucking mouth.