A piece of a story

I wrote this the other day and I wanted to show you guys. It's about a girl named Willow and her little sister, Autumn, looking for the cure to their mom's cancer. It's inspired by a book called Flutter.   Here it is:

***

Willow's arms strained with the effort of rowing. She grew slower with every stroke. But still, she pushed on, breathing heavily.

"Um, Willow?" Autumn said, her eyes wide. "Behind you?"

Willow sighed and turned around, hoping that this wasn't another one of her little sister's practical jokes.

Her face went pale as a dark, slender creature emerged from the water.

***

Did you like it? Should I write more? Let me know what you think. 

Thanks for reading!

~Devin