Name is ***** ***** yrs old. In a common law relationship…

Hi,
Name is ***** ***** yrs old. In a common law relationship for 4 years. I work a rotation schedule of 2 weeks on 2 weeks off. We live in a house my father bought and we rent to own. I pay around 70% of the bills. My last time home my gf informed me her parents and sister who live 8 hrs away would be coming tp stay with us on my next time home. She never asked me but told me and when i said i didnt mind a few days but a week is alot she got mad in a how dare you type of way. I work night shift and have a hard time bouncing back and regulating my sleep as well as recharging after my 2 week rotations over and i get home. So they showed up for my last week home and i had to play the gracious host which left me emotionally exhausted and now im back at work feeling unrested. One thing that happend while they were there is that they took over my bathroom which is in the hall and i was using the gf's bathroom as its an ensuite in our bedroom. I happened to leave a towel on the floor she uses to dry her hair after showers and she toId me in a snarky tone to put things back where i find them. Bear in mind i was only using her bathroom cause her parents had taken over mine. This has left me pretty resentful and would like some input as the weather this is justified. I think she has some ocpd and npd features but dont get me wrong i have my own issues as well which makes it hard to know when im being resonable vs selfish.