No baby shower please

So this will be my 3rd baby and my mother and aunt wants to plan a baby shower for me. I have said this to my mother more than once that I do not want a baby shower for many reasons. One of the reasons is my MIL has cancer and isn’t able to travel. But mother seems to not care about that. Her reason is, “you’re going to need a lot of stuff”. This pregnancy was planned and she knows that. Why would I plan for another baby if I could not afford it? I told her I can get everything for my baby. Not to mention I keep my circle very very small so she plans on having a bunch of people I don’t even know there. Mostly her “friends”. The same people she said she’s cutting off every other week. I’ve made it clear so many times that I do not want a baby shower but she keep insisting. I don’t want to be rude and I appreciate the idea but I do not want one. What should I do?