Advice?

Hi ladies, I am currently pregnant with my miracle/rainbow baby. I plan on doing a maternity photo shoot when further along and I plan having a photographer take photos of my baby during the whole labor and delivery thing. I've been trying for years to have a baby and I have been through recurrent losses. It's heartbreaking. But I'm super excited for this baby. Well, I have a step daughter who is 5... If she ever asks why? I don't know how to explain to her that there are not any pictures of her like her sibling? Such as her growing in my tummy, hospital pictures (labor and delivery) or just a newborn photo shoot. I did print out about 5 picture of my husband holding her for the first time in the hospital and right after she was born. But there are no pictures of her biological mother holding her and such. The donor is what we call her since she abandoned her for drugs when she was 2. We have step daughter first school picture and Santa picture. I don't know how to explain to her why she doesn't have a baby book. I don't know how to explain to her why she wasn't in my tummy. I don't know how to explain to her why she doesn't have those kind of pictures with her mommy and daddy. My husband really don't want step daughter in the labor and delivery room because he wants to just have that special moment with me, him, and the baby. Which I understand. I'm also wanting to make a scrap book of my baby journey... but now I feel like I shouldnt be doing any of this because step daughter doesn't have any of this... this is my very first baby. I want to be happy and be very excited. I don't know what to do...