Sister making me feel bad

So I'm due to have my second baby end of Feb 2019 and I've decided that I just want it to be me and my partner in the delivery room. The firsttime round I had my mum and the babies dad there, I was only 16 and I felt like the whole pregnancy and months after I had the baby I had other people making decisions for me and now I'm 25 with my own house and partner of 6years and I just want to do things my way this time, it's a special time when in labour and I really wanted it to just be me and my partner but my sister has said I'm selfish and I'm pushing everyone away🤔 am I really? I don't feel like it's selfish. I just want things to be different this time