I really enjoyed the pace of this! It felt like action was happening and it made me want to read on to understand where it was going to lead.
The only bit where I got a little lost was the second paragraph. I liked the idea of giving an insight into the state of their home and a bit of a backstory about how it came to be, but I found the story a little difficult to follow and confusing whether the story about the fisherman was happening now or in the past.
I loved the way you kept using the sister’s image to help us empathise with the protagonist and paint her in a positive light. You did a great job with this prompt, well done! :)