Whether Mum and Dad ever suspected us of anything, they never sat us down and questioned us about our closer relationship. Amy even suggested they knew, as parents just seemed to know those things, and simply didn't mind as I would be leaving, and it was better being together than otherwise. As for Katie, she saw the closer relationship and, though I would never approach her intimately, not before she was 18, I was certainly making sure I gave her just as much attention.

Amy came with me the day I purchased my ticket. The travel agent obviously asked a few questions, and I think I impressed her when telling...