I went to DS1's parents evening last night, and all his work was in his tray for me to look through while I am waiting. I was looking at some pieces he had written about himself, his family, pets, fave foods etc.
He had written about three or four pieces on the same theme, and in each one he doesnt mention his brother, just his mum, dad and sister in his family - he even mentions his pets, but nothing about DS2, who we suspect is on the spectrum.
When I mentioned it he got really upset and started crying, saying that he hadnt missed his brother out and I must be wrong.
They are very different to each other. DS1, who is 8 is very outgoing, extrovery and a little OTT sometimes, never sits still and loves noise, whereas DS2 is completely opposite, and doesnt take kindly to DS1's craziness, in so much that he avoids him and backs away from him.
I didn't think that DS1 had picked up on DS2's indifference, especially as DD who is a baby, loves his craziness and is always giggling away with him.