Something New. Paranoia?

I brought Kate over the Panera for lunch before the sitter comes and I go to Rotary. I left her at a table while I ordered. When I came back to the table, she asked if I had noticed the man sitting at the table across from us. I told her that I had not paid particular attention. She said, “When we came in, he looked at us. Then he left.” Unsure of what she was trying to say, I asked, “Do you think he realized that is the table where we usually sit and got up so that we could have it?” She gave me a funny look. Then with a little hesitation, she said, “I may be wrong, but he may gotten up to do something like mess up our yard or something.”

I recall that being paranoid is a common characteristic of someone with dementia, but up until now, I don’t recall any sign of that from Kate. I wonder if this is a sign of things to come.