Belting commission

First and foremost, I'd like to mention that this is a great artwork and it's obvious a lot of time and effort has gone into making it so.
That being said, in terms of vision, the visuals of the work are amazing, with shine consistently in the right places from where the unseen light source is. Also, the outlines as well as the colouring of the people and the objects around them alike is practically perfect. All the way down to the shadow on the girl in pink's face an on her legs, everything has been accounted fr. The only problem is that the girl in pink's left eye (right from viewers' perspective) seems to go through her hair slightly, but that is almost unnoticeable and most people wouldn't even see it.
In terms of originality, I'm almost certain that a picture of a guy being spanked in front of a girl has been done many a time before. However, his position and the girls' expressions are really something new to me personally and something quite admirable.
In terms of technique, the message is delivered perfectly, the belt meeting the boy's bum really shows it's hitting hard from the motion blue and background effect and their faces say it all. Every single part of this picture is well composed and related to another part perfectly.
Overall, the impact is immense and it's easy to see that the girl on the floor is very concerned for the boy and her own bottom, as well as the guy being in pain and having to accept his punishment and humiliating spanking. The girl on the bed sums it all up as an evil older sister or friend, bemused by their misfortune. Her face and her posture show her easily in a position of dominance and it is simplep to see that she is in charge of the situation.
Overall, an amazing artwork and hope to see more similar to this in the future.