Hope all are having a good Thanksgiving week and looking toward the longer holiday season. It's our first holiday season with an elderly family member in dementia, so we move on a spiraling curve with the opportunity of learning and opportunities to be charitable. For a former school teacher and one engaged with the world in general, her mind writhes with increasing confusion and fear. We do our best, but think we fall short.
I can only wish you luck and tell you to enjoy what she has right now understanding this is probably the last holiday to do so while it is still there. From experience I would recommend pictures of family and albums in a completely silent room...it sometimes works.
It worked with my uncle, the last coherence I had with him before he passed....I wish I had done it more.
My mom has been slowing slipping away with dementia. She is at peace with it so that helps. From your post I gather your loved one has never and doesn’t now think you or your family fall short. Perhaps circumstances preclude a completely happy thanksgiving but I wish your family one.