Overall, I think it's a good shot. Two minor things that I see are no catch lights in her eyes and her elbows are locked. Her eyes look like two black holes and the locked elbows make her appear very tense. You could play with snooting your strobe use a black reflector for some negative lighting to create some more shading in the photo, which would affect the flat lighting.
She is a very lovely lady. Will she model for you some more? Keep working with her and she'll relax more and more.
Thanks for sharing!
Good day.