I would say your portrait has a subtle natural look which I really like. The judges in my club might, and often do say, they want to see a catch light in the eyes. They say the same about birds. I do see a faint glimmer in her left eye. Maybe raise the brightness in her left eye a touch, so that it still looks natural. Having said that, it is fine by me, as is, because the natural expression is so powerful, that is what the viewer immediately notices and takes away.
Well done,
JR