The deal is for the remainder of her 10,000-word story.
Two years ago, this project would have been well within my range but things have changed a lot since those days.
The biggest change is that I doubt my ability to go beyond 5,000-words.
With the lack of interest in my work, I have down-sized my writing to the minimum - I saw no point in doing the writing when nothing was selling.
In the last two years, the largest work I did was a series of short stories (5,000-words) for clients on Upwork https://www.upwork.com/freelancers/~0115a52654d3cda29a.