Another Doppleganger?

I was sitting in the living room watching TV and I seen our oldest daughter walk down the stairs listening to her CD player.Only thing is, it turned out not to be her. It was wearing the same clothes and everything she is wearing and walked out into the dining room. It was about time for our son to come home from school. I know this because I looked at my phone clock and it read 3:33.Not long after that our son knocked at the door. I yelled for our daughter to get it,but came to find she was upstairs. It was so real life and nothing made me think otherwise.