“Bitter baby mama”?

I’m not sure where to post this, but hopefully we’ll get answers.. I saw “relationships” and figured this might be appropriate to post here.

Please be prepared this is LENGTHY...

A little over a year ago I was dating this guy, it wasn’t serious, YET, we weren’t ready for anything other than sex at that time. We were both seeing other people but it was what it was at that time and that was that. I ended up pregnant and we both decided that we wanted to keep the baby (she’s here now & she’s the best thing that has ever happened to us). About 2 weeks later I received a text saying that he got someone else pregnant. We decided to go about things maturely & we all went and had dinner together to figure everything out. He mentioned that night that he wanted to work on an actual relationship with me, (the other girl seemed fine with it at the time). Fast forward we became what I thought was “great friends”.. we hung out went to each other’s appointments we got close! (Or at least I thought we did.) Fast forward again, by this time I have an apartment with the guy & we’re in bed one night and we get a call saying that said females water had broke. She wanted us both there. Ofc we were there! She gave birth to a beautiful baby girl that looked just like the father! She was beautiful! I cried tears of happiness because I genuinely bonded with this woman. 4 days go by & I give birth to my little girl...... Here’s where things get messy. We sent her a picture of our baby once she arrived & her response was “are you sure that’s a girl?” I laughed that one off because this was my second baby, I know they can look a little funny at birth! She then proceeded to text my boyfriend saying that the baby looks nothing like him & considering her baby looked exactly like him that he must not be the father. Thankfully he had no doubts and he knew she was his (she now looks just like him).. about 2 months go by, I’m hanging out with the other female spending time with the girls, cooking, laughing, just having fun! I then got an alert on my phone saying my my period was 5 days late. I show her, we laughed and then she offered me a pregnancy test, I took it and it was positive. She then proceeded to comfort me saying “maybe it was faulty, try another one”. At this point I’m crying, but I took yet another one. Boom, POSITIVE. Her whole attitude changed. She went on to call me stupid for having a baby that close to the last, she also said these words that stuck with me. “(Enters boyfriends name) is scared of me, he thinks I’ll put him on child support, and I’m that grimy bitch that will do it.” A few weeks later at my dr appointment I figured out that I had a belighted ovum, so the pregnancy was nonviable. Anyways, fast forward again... here we are currently, she came over one night and we had the girls together spending time and having dinner. She ended up getting drunk and made a huge scene my boyfriend and her began arguing, he told her to leave and she wouldn’t, he grabbed her arm (without any force) and began trying to walk her to the door (we had the kids bc we weren’t allowing her to leave with a 5 month old that intoxicated). She flipped out she pushed my boyfriend & basically began fighting him, he did push her off. At that point I called the police on her... she didn’t go to jail, but my boyfriend did... he got a 2nd degree CDV for this.... She just recently placed him on child support & posted things on Fb about how she’s using it to get her nails done. I’ve never been through anything like this before, but is there anything we can do? This woman is making our life a living hell. Her mother’s brother just threatened us saying “when I see that car get ready for these rounds”. (Yes, talking about shooting at our car). She has her family under the impression that he hit her. Never once did he. I now feel unsafe and we have no idea what to do. Does anyone have any advice?