Advice please :)

Lu.
Hi mommas :) I need some advice. When I found out I was pregnant with my first baby my SIL became very upset and verbally abusive towards to my husband. She wanted to have the first baby in the family and I'm due at 2 days before her wedding so she said our child will steal her spotlight away. She then began spreading false rumors in the family about me. Sooo, I've basically been keeping away from her bc she's a nut job but also keeping the rest of his family at a distance bc unfortunately they believe the rumors she's spreading. 
I'm 30 weeks now and torn about a baby shower.  I don't want one because of everything that's happened and the stress it's caused me. My family is ok with no shower but my husband and MIL, who is also not a friend of mine, are insisting on one. What's ur input? Suck it up and have the shower or follow my gut and keep things simple and quiet?