Baby mama drama

Kailey • 23. First baby ♥ due July 28th 2016 :)
I'm so sick of dealing with her and her texting my boyfriend rumors about me cheating and her telling him to get a dna test when baby is born cuz its not his. How do u guys deal with them?? My boyfriend is 26 with soon to be 4 year old twin boys and I'm 23 and 10 weeks pregnant and ever since she found out were dating she freaked out. Even tho she left him and would just party and lie and sneek out. They haven't been together or tried to be together for like 2-3 years. Shes very spiteful and it ruins my mood when I see her texting constantly with bullshit. She needs to just keep it about the kids and nothing else. He doesnt want her back he said cuz he already knows how it's going to be and end up. But she talks bad about me alot and tries to break us up and its really hurting us and making us fight. How do I deal with this. I know they need to talk for the kids but I really wish she didnt have to talk to him cuz then they always go back and talk about their past and It pisses me off. He has 50 custody for fri-sun but had an agreement to do every other week but since she found out about it she switched the schedule up then sometimes will text him her problems saying oh take the kods u can never help blah blah but yet she switched shit up and he offered to do the week thing again. I'm just so over it and want is to be a family but its hard when she's always in the way and messing shit up. Idk wat to do anymore....