Who is in charge of the hens party?

I was asked to be a bridesmaid at my cousins wedding at the same time two others were asked and one was asked to be the MOH. I have just had messages from the MOH detailing every aspect of the Hens Party, she has planned everything and as far as I can tell not asked for any input from any of the rest of us, is this normal? I feel like, as a Bridesmaid I should also have at least been asked for ideas or opinions and not just been told the details like any other guest?!