MIL mad about baby name.

So we had announced what our daughters name was gonna be awhile back. I knew a bunch of people recently who had their babies and had used the name I was gonna use. So the other day my fiancé and I decided to change the first name and keep it a secret and my mil is not very happy about. Which I don't really care and neither does my fiancé because she tends to be over dramatic. But it's just sooo annoying! I was VERY open with my 1st pregnancy and labor and delivery and this time I want to be a bit more discrete and I shouldn't be punished for that. We want this time to be a bit more intimate and private especially since this is our second child we want our first to have her time with baby sister before anyone else.