Who are you?

Today was the first day my mother didn't recognize me. I don't know WHEN she didn't recognize me. She's always friendly and gracious and you never know what she is really thinking, but at one point she asked me the usual question, "what are you doing tonight?" When I said that I was going to review a show she said "Yeah, Bev likes to do that too." When I answered "yes I do" she said, "No, I meant BEV likes to do that." When I said *I* am Bev, she suddenly popped into reality again and realized who I was. Whether she popped out sometime after I arrived, or didn't know for the first 20 minutes I was there who I was, I have no idea.