I think it depends on who is asking me about my husband’s Dementia. His older son, whom we rarely see, questioned whether his Dad even had Dementia, so I sent him the results of the 2 hour test results.
My husband has always been quiet but it is his speech that is noticeable now. Sometimes he can’t complete a sentence and slurs his words. This happened just the other day and his sister, who we rarely see, kept giving me looks as if she was aware that he wasn’t himself. But she hasn’t asked any questions about why, so I am assuming she knows.
It is obvious to most who know him that he isn’t the same, but unless they ask me outright what the problem is, I assume they know why. Some people are aware that something isn’t right while others just go along their merry way or just aren’t interested.
The only objection my husband has about telling anyone about his Dementia is a shirt I bought that says “My loved one has Dementia” and he asked if those words were about him. I felt very bad that he felt so exposed by my wearing this shirt that I will not wear it again. It never even occurred to me that he would be bothered by the words. Another lesson learned.