"That was the only time, as I stood there, looking at that strange rubbish, feeling the wind coming across those empty fields, that I started to imagine just a little fantasy thing, because this was Norfolk after all, and it was only a couple of weeks since I'd lost him. I was thinking about the rubbish, the flapping plastic in the branches, the shore-line of odd stuff caught along the fencing, and I half-closed my eyes and imagined this was the spot where everything I'd ever lost since my childhood had washed up, and I was now standing here in front of it, and if I waited long enough, a tiny figure would appear on the horizon across the field, and gradually get larger until I'd see it was Tommy, and he'd wave, maybe even call. The fantasy never got beyond that–I didn't let it–and though the tears rolled down my face, I wasn't sobbing or out of control."
This is a very long quote and not all of it needs to be remembered however it's very useful to remember the general story which Kathy makes up in her head.