How did your child react when a new sibling arrived?

[Kaylz--x]

Hello everyone! My little girl is currently being assessed for autism and I'm due to have baby no.2 soon. Due to her lack of understanding speech she doesn't know there is a baby on the way so I'm terrified its gonna be a big shock to her I'd love to hear how other children coped when a new baby came along and maybe some advice please?

Many thanks