I can totally relate to that. Not to do with the mail, but my folks separated when I was very young and unbeknown to me at the time, when we stayed at dads and mum was coming to collect us he used to get my sister and I up an hour earlier, sit us at the kitchen table then just keep telling us over and over that she was late or maybe not coming. The reason being so it would get us really upset and we were therefore a handful for mum I presume.
Oh God, those kitchen table chats. We had them too. Sometimes they went on for hours with my brother and I just sitting in silence. There was a clock on the wall, I'll never forget it, with two red stripes and two blue ones. My dad would sit there talking about money and marriage problems while I watched the hands go round. I just wanted to go and play computer games, I literally didn't care. It meant nothing to me.