Baby name

So I've decided to name my daughter Liv, & everyone says it's a cute name. I totally agree. But every time my cousin asks me what I'm naming her (which she has asked 5 times already, how annoying) I tell her & she gives me this look of disgust & says how about you name her Olivia & just call her Liv? Why in the world would I name my daughter Olivia if I'm NEVER going to call her that? It really makes me mad because she keeps asking me & has the same negative response. This is my child & I'll name her whatever I want to name her.