when my daughter was small and I ticked her off or thwarted her she would often ask to be taken back to her 'other mummy' or her 'real mummy'.....she would also hold long conversations with someone I couldn't see but who apparently was standing right behind me......since she was only 2 I can't believe it was purely imagination.....sometimes who ever it was would make her laugh and a 2 year old can't fake that.......I have no explanations but it's interesting