We want to treat DS as a grown up and he oscillates being a big boy to a small kid. Sometime he resents being told something (just like any other boy in the cusp of teen-age) and sometime he is just a baby... So I was telling him that day that we talk about all these things, because he is growing up and he is no longer a baby and there are social expectations of him (not in so many words though)... Also, we told him that he would live far beyond us and at that time there may not be much help available to him; as my parents have outlived their parents etc etc. He heard that and asked some questions around that... Later on, that night, while in bed, he asked me couple of times as to what I told and why I told those (ie we, as his parents would die earlier than him)... We can see it was playing in his mind.
The very next day this event happened. He has a very favourite pillow - its his imaginary everything - friend, confidante etc. There was some damage to it and he was really broken. He cried for long and during that time, he told me that neither of us are important for him and his pillow was important; and we could leave the house or he would with the pillow...
It was quite rending to hear those words... But after a while, thinking about it, I wonder if his reaction was based on the talk we had the night before - on impermanence of us...