Having a hard time on picking who gets to be with me spring labor, help?!

Because of covid only dad and one other person gets to be there at the hospital when you give birth. It's between my bestfriend who was there for my first birth and was suppose to be my photographer and my sister who just moved here from across the country. It was already planned that my bestfriend was gonna be my support person and also photographer from the start and then my sister showed up out of nowhere 3 weeks ago. She always dreamt to be there for one of my births and now is assuming she's gonna be the one to be there. And I don't know how to tell her otherwise. I would prefer to stick to the original plan and have my friend there but I have no clue how to tell my sister without it causing hell on our relationship. This is the last thing I should be worried about when it comes to bringing my baby into the world. Any advice?