Needing help getting unwanted “tenant” out of the house
Hello! I may be in the wrong area for this but I do need the advice if anyone has any, my sister brought her ex over a few times and then her ex got kicked out of her family’s house over personal issues they couldn’t figure out, so the ex stayed here without asking nor paying my grandmother rent, as my grandmother owns the house fully and has asked multiple times for her to pay her because of how much the water bill has changed since she’s been here.
She’s refused to pay rent, and in my state (Ohio, US) even without paying rent if someone stays for a few months they are legally a tenant and they refuse to leave even after cops have been called and they were on her side but suggested it would just be best to leave, now where we are stuck at, she refuses to leave, and continues to disrespect us in our home when she’s not even paying anything, she’s been trying to antagonize us to the point things get physical so she can have a reason to call the cops, she’s threatened them so many times already and I don’t know what to do anymore.
Please tell me there’s something I can do with my grandmother to make her ex leave without needing to kick my sister out too, I don’t want to lose my sister in this process so I really want to do this as peaceful as possible but her ex has been doing nothing but not even following her own words yet discriminating how I am going about this, her ex has distanced my sister from my entire family at this point and I just want my sister back without her ex driving me crazy in this house, I’ve had to stay up multiple nights to make sure she didn’t harm my sister or go through her things like she’s already threatened to do. Any advice or help would be greatly appreciated as I feel like I’m losing my sanity with this situation going on.
And thank you for taking the time to read this even if you don’t provide advice : )