Inky, I’m thinking you may mean that you type as she dictates. Is that right? If so, I’d just listen the majority of the time and periodically type up one for your portfolio. When we begin longer books, meaning those we don’t finish in one sitting, I will often have the child draw a narration at book’s end and dictate one or two sentences to me for the picture. This is my balance.
My other trick, since I have 4 kids, 3 school age this year, is to let the two older ones dictate their oral narrations into handheld voice recorders if I’m unavailable. Later, I listen and give feedback. This has helped me a lot over the last year.