Bella fotografia!
Your subject looks a little unhappy. It works, though. Is there any way to reshoot with her happy and smiling? It would totally change the feel, but it might be more pleasant. I know when I think of older ladies, I think of them as being really warm and sweet--bedtime stories, and candy in their purses... that stuff. But I'm sure its my preconceived notions interfering with my ability to analyze the photo. Others who don't have that ideal in their head will probably think its great!
Also, the left side of the background seems really bright. I would wait for someone else to comment on whether or not this is a problem. I'm new to this, so I'm still learning how to appropriately observe a photograph.