Tothill may have found the root. You haven't said when the diabetes was diagnosed or how bad it is but that could be a good part of the issue-trying to stick to a restricted diet, worried about what may go wrong, dealing with insulin on the road if necessary. If you haven't done so already, the two of you should meet with her doc and/or a nutritionist for guidance and reassurance. If the diabetes is well-controlled then there should be no issues. I am 52, diabetic with a chronic heart condition. There are some limitations but we just work around them.