My father has dementia and my mother passed away 6 years ago. He is 94 and lives in my home. He suddenly showed up at my bedroom door at night confused thinking I was his wife. I actually had to lock my door. My first response was to tell him he’s confused and that I was his daughter and he needed to go back to bed. He was very annoyed that my husband was there. This morning he doesn’t recall the incident but it actually scared me.