WHAT DO I DO ABOUT MY BABY SHOWER?

My oldest sister is throwing me a baby shower and other than me knowing that she's throwing it, everything else is a surprise: date etc. well prior to her telling me to sit back and relax because she is handling everything I was throwing the baby shower my self and alot of people wanted to help out including my childs father's side of the family his mom his cousins and so on... So i know nothing about what is going on and they are asking me what they can help with and im telling them im not throwing it... his cousin feels that i should have atleast picked out decorations however if i did that it wouldnt b a surprise (duh smh) really she wanted to pitch in for the shower...and im not even sure if she meant finacially...because if i were throwing my baby shower she sure as hell wouldnt b picking out my decorations anyway....but anyways my sister really doesnt want any help the only help she wants is getting guests contact information....but other than that she doesnt want any help...do u think its wrong that she isnt really letting any one else pitch in?