What were the nieces names in footloose 2011?

In the 2011 film "Footloose," the main character Ren McCormack has two nieces named Ariel and her younger sister, who is not prominently named in the film. Ariel, played by Julianne Hough, is a key character, while her sister is more of a background presence. The story primarily focuses on Ren and Ariel's relationship amidst the backdrop of a small town's dance ban.