What to do? MIL problem

:) • Momma to a boy 12•03•15🤎 a girl who was born on and passed on 07•19•17👼🏼 my rainbow 09•06•19❤️ my pot of gold 10•19•21❤️ 09•12•23❤️due 12•18•2025
Sorry for posting again, but I'm LIVID....
So I posed about if I had a baby shower, and reposted it to Instagram.
Well my MIL(who I've been pretty mad at) commented it and said something like "of course I'll be there"
BUT THEN COME TO FIND OUT, SHE DELETED HER COMMENT?!?? 
Like now I'm wondering, do I even invite her now and be the bitch? Or suck it up? 
-she recently came at my mom and I strong, bashing my sperm donor(which I find disrespectful since he gave me life)-