I'm a Schizophrenic, and so Am I.

After returning home from a night out, Robin casually enters the house only to find a strange looking woman claiming to be his mother. Robin refuses to believe her, accusing her of being an imposter. After a short while a strange man enters the room, also claiming to be his father.

If these were the people that raised him... Why doesn't Robin recognise them?

This story was written for this contest.