I think the crop to square is a good choice for this image but I think it should be tighter as the blurry bits around the right and bottom edes are a bit distracting.
A classic primate portrait that I never tire of seeing, as I am particularly interested in primates and their behaviour. The exposure seems to be good. However the highlights are a little too hot for my taste, and since they appear to still hold detail, they can be toned down some, in my opinion. I like the somewhat triangular frame formed by the mother's arms and head around the baby, but I'd rather see that frame in sharper focus. Not all portraits (of animals or humans) have to have such shallow DoF. Overall, a pleasing enough photograph.
Excellent DoF and emotion in this image. Nicely executed. Some bleaching in the mothers fur which may affect your score, but I still think that this is an image to be proud of. Good Luck. 7.