Abigail Painting - mirror contrast study

Abigail did this in art class on thursday - it's a mirror picture - abigail is on the left and sabrina on the right.
 

What is quite interesting is the context behind this study - Abigail and Sabrina are not the best of friends - Sabrina is older and is the class bully. Apparantly Sabrina held up the mirror for Abi to draw half of her face then took it away. So this painting (and the next one) were done mostly from memory!