Rrrr. Well. I’m actually startled. Your shines, reflections, and shadows make sense everywhere except the torso side facing us. That bright area lit by whatever is pushing the cat’s shadow away from us should blend into the area on it’s back. That sharp line could normally only be explained by a perfect coincidental angle that always looks wrong in a picture or a boundary created by a bone ridge, protruding dander line (raggedy,) or some prismatic or mirage effect.
I personally would have made the cat JUST backlit and had a darker cat. Much easier. But you love your pastels, right? Blend the two areas with some more gradients, I guess.