I realize it’s difficult to see someone you love decline. It sounds like she’s still rather active. And has people around her who care.

Her husband can consult with an attorney about ensuring they both have their estate planning documents in place, Healthcare POA, Durable POA, Advance Medical Directive, etc. That’s a good idea for any senior, so maybe she’ll comply.

Also, you or husband can send message to her doctor of observations so he can monitor and test. Most do cognitive screenings and suggest meds that might help slow down symptoms at the appropriate stage.

I took my cousin to a neurologist for evaluation initially to rule out things like a tumor, fluid on the brain, neurological disease, etc. which was done very quickly. She had blood work and an MRI. Her symptoms were very pronounced and she was immediately diagnosed with Vascular Dementia at age 63. At least we knew why she was declining so rapidly at such a young age. And, it helped to get her qualified for care and admittance to Memory Care.

If your mother ix not seeking services, that official diagnosis might not be critical at this point. If her doctor is aware, he can monitor it. Perhaps he could check her vitamin levels to ensure no deficiencies. That can cause cognitive symptoms. With my father, I realized that there might not be any benefit for him to acknowledge and accept that he has Alzheimer’s. Even if he did, he’d forget. So, it’s enough that we know and care for him.

Good luck with everything. I would have her driving evaluated. Check with her doctor and DMV about an assessment. The safety aspect is crucial.