Telling my shared daughter she's a sister again!

My husband and I just recently took two home tests and both came back potisitve. I was so happy I cried 😄😄 we are both happy. We have a son together and we have a daughter. She is my shared daughter or stepdaughter. She is 6. And our son is 1. I decided to make her a book to tell her, but waiting to get the first ultrasound, which is next Tuesday. I feel it's not coming fast enough!! I'm super excited because I have been wanting to tell her, but I thought maybe the book would be a fun idea she can keep. These are our kids and the start of her book. I'm just having trouble finding good Kings, queens, prince and Princess pictures! Lol