My grandpa had dementia. Last time me and my mom flew over to visit he didn't recognize either of us the first day. He didn't even remember having a daughter. S

My grandpa had dementia. Last time me and my mom flew over to visit he didn't recognize either of us the first day. He didn't even remember having a daughter. Second day he vaguely recognized my mom but not me. Third and last day of our stay, as soon as I entered the living room he lit up and exclaimed my name. We sat and talked for hours, reminiscing past events with great details, until we had to leave for the plane home.