I'd love to see a closeup scan of this portrait; the faces are beautifully lit/rendered, and the hair looks beautifully textured.
There are only two areas that confuse me. 1. The older girl's arm/leg area flattens out in value, but then the hand is rendered at the edge. Again, it may be that a closer scan would clarify this area. 2. I can't anatomically connect the boy's shoulder and forearm. I don't know what to suggest, so I don't know if these comments are useful
I viewed your website and you don't need me to tell you how accomplished you are! "Red Ribbon" is especially striking in its simplicity. Certainly a portrait of three children is challenging in the "pictoral drama" department... Good luck!