Ok so I am basically fed up with my gf of 5 years

Everything was going quite well last year before covid.

During covid her sister goes back home to her parents now with a child, she then starts talking to my gf about how it's better to be free and shit, that men are assholes and what not, she takes my gf god nows how many times to get wasted, and well I'm not that type of guy, I enjoy a nice whiskey or some tequila but never to the point where I don't remember all that happened.

We then move out of the city to somewhere better, rent a house and since i work from home everything is chill, except that nearly every fucking day her sister calls and tells her to come over and drink and shit, now we live like 1 hour away on a good day so it's not very doable but everytime that bitch calls I get shit for moving so far away etc.

Last night a 11 pm im starting to dose off and her phone starts ring, it's her sister completely shit faced calling with one of her hookups saying to her to come over and get shit faced with them, to go alone cause I'm not fun and shit, then I learn that before we left her sister had told her that its the worst thing she could do by going to live with me, that we'll just be stuck inside (no shit we're still in a fucking pandemic) and that I'm basically no fun.

Well when covid hit hard, guess who was rhe only one with enough saved up for when shtf...yep Me, anyway I digress.

Today in the morning my gf tells me she wants to go 1 month to stay with them saying that's its to boring where we live and that they're having fun and shit, I told her that if she leaves I don't want her back, I'm not some fucking light switch that she decides to turn on and off, she tells me fine I'm not coming back.

Now I'm not some hard mo fucker, of course it fucking hurts me to think that she prefers that shitty guetto lifestyle compared to what we have now, but at the same time this year I'm thinking about opening up a fast food place, so I really don't want the added stress of shit like that to the stress of bringing up a business.

My whole dilemma is should I tell her parents in advance to let them know that 1) It was her low life, poor ass sister who got her thinking like that 2) I never told her to leave directly only if she's going to get wasted and whatever else do I not want her back

Thanks in advance guys, I now I can always talk to you!