My sister is jealous of my pregnancy

I posted 2 months ago about how physco my sister has been about my pregnancy. Her and my husband don't get along! And my sister calls him dead beat, piece of shit, and claims my husband is cheating on me. She obviously jealous of my whole relationship and she tells me everyday she's done more for my son then he has which is a complete lie! I got pregnant with my second son and due March things changed with her attitude! my husband said she's not allowed to be around our kids she's toxic I couldn't agree more! She started saying she doesn't care she's showing up to the hospital and is going to fight him if she has to. She told me 6 years of being together is enough I should be a single mom like her. WTF! She then says I should be picking family over a man he's my husband ?! wtf is wrong with her. My husband knows she's jealous of us she has a new man almost every month and asks them for a child and they either run or it doesn't happen lol. Fast forward I said the only people who can come is my dad and my husband's mom my 1st son is autistic he doesn't need to be around someone who tells him his dad is a bad man etc. Sad right? so she finally after 2 months got it thru her head she's not coming to the hospital. She called me two days ago asking if she can at least get a picture I told her I'm not posting pictures I'm deleting social media she says I'll post them on mine I want to show off my baby wtf does she not get. I brushed it off and changed the topic. Then she goes on and says I better call her when I give birth or she's showing up to the hospital omg... I'm stressed the f out and my problem is I keep my mouth shut to much! my husband is taking my phone and shutting it off during my stay in the hospital so she doesn't harrass me. I think she crossed the line there's so much more she said that everyone says wtf when I tell them but I rather not even go on. Has anyone ever went thru this with family ps my dad came over and asked if I can sneak my sister when my husband isn't there.