Lovely pose and smile. Dolls eyes are sharp suggesting you missed the focal point of Morgan's eyes. Are you using a single AF focal point in your viewfinder? If so, you shouldn't be missing the eyes.

I can also see noise on her face which suggests under-exposure. With a 50mm prime of f1.2 or 1.8 you really should be able to get the exposure better. However, although you seem to have chosen several light sources (which shows you are thinking) the overall dynamic range (difference between brights and darks) was too much here and caused hot spots even though areas like her face was too dark. Either that or you used an ISO that was too high.
With portraits, try to stay at ISO 100 - 200 ... 400 if you really, really have to. Make the light work for those ISO's, not the other way around.