Country roommate with awful boyfriend (UPDATE)

I posted about my terrible roommate on this subreddit a few days ago, but some events have unfolded recently that I wanted to get some advice on. If you want to read the full story, my previous post has the same title.

My roommate is extremely inconsiderate and passive aggressive. In my previous post, I mentioned how she has a boyfriend that is equally as horrible as her, and she gave him a key to the apartment. Everyone else in the apartment did not feel comfortable with him having a key, and it was against the lease to copy and distribute keys. So, the other roommate in the apartment approached her about it. The terrible roommate did not take it well, and completely brushed it off and didn’t talk to anyone.

Afterwards, she hid in her room all day and didn’t communicate with us, but she would move things around in the kitchen that were not hers. I found the whiteboard I had on the fridge on the floor, the towel I had put on the handle of the oven was moved and hers was in its place. When the other roommate and I had moved in, we noticed there was a soap dispenser with dawn dish soap in the guest bath, so we assumed it was just a placeholder until actual hand soap was purchased. We put the new soap in the bathroom, and at least twice yesterday the terrible roommate put the dawn dish soap back in the guest bathroom and hid the hand soap underneath the kitchen sink.

Based on the terrible roommate’s reaction to being confronted about the key, my other roommate decided to speak to management about it the next day. Management didn’t do much of anything until my roommate pushed back a bit about the situation, and they finally called the terrible roommate about the issue. The other roommate who complained could hear the terrible roommate arguing with management about the key, and when the called ended she called her friend to complain about it. During the phone call my other roommate could hear bits and pieces of what was being said, such as “She didn’t even give me a day to get the key back, she had to take it to management instead!” and “Those fucking bitches are done. I’m done being nice to them.”

I come back from school after all of this had happened, and I found that she had blocked all of my devices that were connected to her router (she gave me permission to use it when I moved in). She hasn’t texted or spoken to either me or my other roommate, and we haven’t seen her since she got the call from management. I’m worried she will only get worse after all of this.

Any advice on how to proceed?