“Of course, I should have known the kids would pop out in the atmosphere of Roberta's office. That's what they do when Alice is under stress. They see a gap in the space-time continuum and slip through like beams of light through a prism changing form and direction. We had got into the habit in recent weeks of starting our sessions with that marble and stick game called Ker-Plunk, which Billy liked. There were times when I caught myself entering the office with a teddy that Samuel had taken from the toy cupboard outside. Roberta told me that on a couple of occasions I had shot her with the plastic gun and once, as Samuel, I had climbed down from the high-tech chairs, rolled into a ball in the corner and just cried. 'This is embarrassing,' I admitted. 'It doesn't have to be.''It doesn't have to be, but it is,' I said.The thing is. I never knew when the 'others' were going to come out. I only discovered that one had been out when I lost time or found myself in the midst of some wacky occupation — finger-painting like a five-year-old, cutting my arms, wandering from shops with unwanted, unpaid-for clutter.In her reserved way, Roberta described the kids as an elaborate defence mechanism. As a child, I had blocked out my memories in order not to dwell on anything painful or uncertain. Even as a teenager, I had allowed the bizarre and terrifying to seem normal because the alternative would have upset the fiction of my loving little nuclear family.I made a mental note to look up defence mechanisms, something we had touched on in psychology.”