Well, had to read the Writing.com story to get the complete picture but the story, both the whole story and your chapter alone here, are good! I enjoyed a lot the wholesomeness and the growing love the sisters shared, and it's a good relief to read a nice gentle, short story with a growing kid being somehow able to understand the responsibility with her new size and strength, not wanting to hurt the ones she loves so much! Most kids would do the same if they were growing, it's nice to see a story addressing it so naturally.

Why don't you get the other chapters and include in this story? It'll be good, I guess, and you can continue the story the way you want.