Sabrina is walking her younger sister, Tabitha - who is undoubtedly not very happy about the situation... Neither the walk nor the proprosed "peeing on the ground" will suffice. At least, there is a fresh roll of toilet paper... Right?!
Thank you very much for the compliment and feedback, vrine! Anatomy is a difficult one for me to do - especially in pixel art. You're right concerning the waist - I should fix it soon.
I really like the way you've done the background, and the personality of the characters. Sabrina's waist is anatomically off and could use thickening out in the back to correct her posture.