Apologies for the delayed response -
"Too hot", the lights are burning out detail on the skin. You can double check how much it's burning out on histogram notch on Lightroom. Or check as you are going along in camera by turning on highlight clipping warning.
Also, if you've got a 5in1 Lastolite reflector and composition allows, try placing it just underneath the models face out of shot as this is a effective way of bringing in some extra light.
Hope this has been remotely useful!
James