How do I get my dad's girlfriend to leave?

Anonymous
I know what you're all thinking, I just don't like her because she's dating my dad and blahblahblah all that junk. But, that's not it at all. They started dating last year, and she moved in 3 months later with her four kids because she couldn't afford to stay at her old house. I was really nice to her and her kids and we got along pretty well. I didn't really like having all of these people living in my tiny house with my dad and my brother and I, but I felt bad so I dealt with it. But, she moved out like 4 months later because her and my dad would fight a lot. So she got a new apartment and they stopped dating but my dad would help her out as a friend and stuff. Then they started dating again and I knew she was using him for rides (she has a suspended license from a DUI and no car), money, etc. Then over the summer she broke up with my dad for another guy, faked her own pregnancy, planned to marry her ex boyfriend, and was still coming to my dad for help. So, by this point, I assumed she was crazy. She just lost her new apartment because she couldn't afford it. So, her and 3 of her kids (the oldest moved in with his dad) came to live with us again. My dad can barely afford the bills when she's here, and she doesn't give him any money. We just had a big fight with her and her ex-sister-in-law which involved the cops. Yeah, not good. So, I figured we were done with her. Instead, my dad ended up forgiving her, as usual, and she's still here. She's a bitch to my brother and I when my dad isn't around, and when he is home she'll just complain about me because I don't like her. I just want my dad to see that she's using him, I mean... I don't really feel like ending up homeless because my dad can't afford the bills when she and her family are here.
How do I get my dad's girlfriend to leave?
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