sandy, I am sorry to read this. It must be upsetting for you to have considered that the lady may have taken the items and once that seed has been sown in your mind, even as a possibility, it probably will mean that you will have need to question her honesty in the future.
I have no doubt that you are a gentleman and would do anything to avoid a confrontation with her. I agree that it would be best to explain you have mislaid the items yourself and ask if she has seen them. I wish you well with the matter.