OK Ray,
So it looks like everything has been just about covered and this one has been nit picked to death, so here are my two cents on things you can do for next time.
1.Offer to do a re-shoot just to see, no pressure, just say you need the practice. This might loosen things up for both of you.
2. Get yourself a lovely roll of seamless paper. Your back drop right now says two things to me, "home made" or "hippy", neither are what you want for a head shot. The tie dye is great for kids and pets, even some families, but not for something we are going to put on business cards.
3. When you are working with her use a step or a small chair to get above her eye level, making her lift her chin. This will help with slimming her face.
4. Did she joke "Can you make me look thinner?" before the shoot? It's never a joke. They really want to look thinner. I ask my clients to do some "light yoga" with me while they are posing. Face them 90 degrees away from the camera with their arms clasped in front of them then twist their upper body back toward you as much as they can without hurting themselves. I tell them the more you stretch the thinner you look and they always try harder.
5. Another alternative to the arms crossed pose, which to me says "I'm not listening, I'm telling.", is the old chestnut where the client has a small step (very small for ladies in skirts) that they put one foot up on, then lean forward resting their weight on their knees via their arms or elbows (depending on the size of the step). It forces their necks to elongate, their chins to rise and brings their shoulders into square while giving them something to do with their arms. This pose always says to me, 'I'm engaged and interested' and is a solid pose for business use.
6. And to combat the "Cheese" factor, because everyone reverts to 3rd grade when they are put in front of a back drop, say something like, "Please look directly at me and give me your best 'I'm going to sell you a big policy' smile." Or something to that effect. Remind them this is for business and what we are selling is confidence in competence.:thumbsup:
Hope that helps for your next time!