I (22yoM) have changed all the names and this post because I don't want it all to get worse.

Ok first, some backstory. So since my sister Greta (21) moved in, issues have been brewing. She moved in a couple months ago. She is bipolar and was off her meds. She also has been up too some heavy drinking, which results in her getting into a screaming match with her boyfriend every other night at like midnight. Greta only moved in here because she needed a place to stay until she got on her feet. She never wanted to move back in here and she reminded us regularly. About a month or 2 ago she was talking shit on our mom (42). At first when she would vent I just wanted to let her have the space to work through it all, and I lent her my ears. Eventually I realized it would never let up. Everyday was something different, someone different. The things she would say or the grudges she held seemed more and more to be inaccurate or just not make sense. I'm used to her doing it but she is constantly talking about people and I decided to give her advice on how to get out and away from our mom. Since my mom is the one she complained about the most. She and her boyfriend only work a couple days a week and she was complaining she wasn't in a good financial place to pay rent. She had several months living here without rent and I started talking to her about getting a full time job. She didn't like that and proceeded to go to her room where everyone could hear her have an entire meltdown sobbing and screaming. Then Greta waited until I was at work the next day to text me a novel of "you're not my dad you have no right to push your opinions on me and scold me." That literally didn't happen, and I said nothing that would warrant that response. So then I proceeded to try to keep the peace and just not say anything when she was spewing her BS. Whenever we were in a room together I could barely say anything without her being sharp and taunting me. Every time she'd get on my nerves I would tell myself to shut my mouth and just steer clear of her. Even tho she continued to spew false slander about me to her friends and our family members. How do I know she was doing this? I can literally hear her through the wall. We live in a modular home, she knows the walls are thin and she talks very loudly. She does not care.

Then yesterday my brother Geo (19) and I were cleaning the kitchen when Greta came out and very rudely pushed past me to get to the sink. I made a joke about her stepping on my shoe in a funny voice but she just ignored me. I heard my brother say "woah" and I look to see her washing blood off her hands. Both Geo and I ask her what happened and if she's ok, but she continues to ignore us. Then she goes back to her room and starts another meltdown. Geo put on music so we couldn't hear her through the wall because she was wailing and throwing things and screaming. We gave her the space to cry cuz we thought she made it pretty clear she didn't want to talk to us. I then had Geo pauses the music because I was getting overwhelmed by all the noise The music wasn't doing a good job. But then I hear her talking to someone on the phone complaining about how she's completely alone and no one is there for her when she needs it and even her selfish brothers were just standing out there and not checking on her. I yelled through the wall, "We literally asked you if you were ok when you were out here." She's screams, "But now I'm in here crying and you don't give a S." This pissed me off because there is always some sort of problem without fail. So I yelled, "why would I wanna go in there when you're throwing a tantrum like a 4 yo girl." Then she really started laying into me. "You guys are lucky I don't start coming after some feelings." "What the hell is that supposed to mean?"

She starts going, "you pathetic peace of S, fat A F, nobody loves you, you're all alone, you hate your own life you Fing P." This sent me to another level and I didn't want to just take it anymore when she started to very directly attack me with the most hurtful things she could think of. So I went back there and punched her door. I thought it would just open but one of the hinges ripped right out of the wall and left her door teetering in the doorway. I failed to consider that hitting the door might not be a good idea, since it had already been ripped off the hinges by Greta when she was 16. We only put it back up to accomidate her as she moved back in. She's like "oh yeah you punch my F door, P" she then rips the door fully off and we are standing there inches away from each other screaming with everything our lungs could muster through the door way. She then calls her boyfriend to come get her and he didn't even have a car. I went outside to walk off some steam because I was shaking and I texted my Mom apologizing about the broken door. Little did I know my sister was already calling her and other people, spreading the news about my aggressive behavior. Too bad all of our family know me and didn't agree with her and she started laying into them too. Somebody came and picked her up then. My mom called me and I told her exactly what happened. She and her bf Jack (48) started talking to me and Geo about what to do next. Apperantly Greta started fueling her bf up to come back and kick my ass. I wasn't worried about a fist fight but this guy has a gun and grew up as a gangster in the Dominican Republic.

So I was worried if things continued to escalate he would just shoot me and Geo. Andre (24) is usually pretty cool but I didn't know him well enough to be sure of what he would do. My mom and Jack said to call the local police bureau, report a domestic disturbance and ask for advice. We didn't get the chance because they came back. Geo locked the front door and stood up against it but that didn't stop them from climbing in through the window. My brother stayed on the phone updating people and I began recording everything that was happening. They just started packing their things. Greta started trying to instigate more fighting but I didn't say another word to her. I just let her go off and hoped my phone was picking up the evidence. She kept screaming the P word at me over and over again, along with things like "yer mad I called you fat but its the truth, I mean 450lbs god 600lb life MF, how pathetic." And that cycle just continued with varying wordage. Then she got on the phone with a friend and she told her friend I walked up and ripped the door right off the hinges because she called me a P. Her friend started saying that she was in legitimate danger because of my aggression and that she needed to have me arrested. This was a little funny to me seeing how Greta was acting while literally drunk and Andre has warrents out for his arrest and owns a gun. I heard her turn to him and say, "we're calling the cops."

They didn't get a chance to because Geo heard it and sent a text to my mom, who then called the cops and started making her way here as well. The cops came and I greeted them outside and told them the story. Two cops went inside to talk to Greta but as they approached the door she was already throwing stuff again and she didn't know they were there yet. They kept Geo and me outside and I couldn't hear how the conversation went because one officer was outside talking to my mom over the phone. I heard Greta inside wailing again and crying dramatically to the officers. My mom just asked them to mediate while my sister got her stuff together to leave and go to my uncle's house. As she passed us on her way out the door she said, "Fing Bs" to me and my brother and an officer peaked his head out to say, "might wanna keep your mouth shut". 2 officers left with Greta and Andre and one stuck around to greet my mom when she got to the house. Then they came inside and Jack changed the locks on the front door.

That's pretty much all of it. I didn't go to sleep until like 4 am. I was too shaken. The whole time it was happening I just wanted it to end. I was tired of fighting and I really don't understand why it has to be this way. Greta treats everyone like garbage and then blames them for not wanting to be around her. She even said at one point that it all started because she was mad at Andre. She didn't acknowledge how she started taking it out on me because he wasn't around for her to beat on. It's been a few days now and it's hard to keep the details straight when hearing her twist the information so much. I had my next therapy session moved up to last night and am trying to work through it all. While terrible and exhausting maybe I could use this experience to try out the whole reddit thing.

I know Greta is an AH but am I also the AH for giving in to her taunts and hitting the door?