It sounds like your ds really looks after her - so sweet. How much does he understand about her SN? I am (very maybe) thinking about having another but trying to work out how much dd's SN would effect them and at what age they would start understanding about it IYSWIM.
sorry HITC, i missed your question about ds. i think he is very aware that his sister is different but tbh he hasnt asked any questions about it. It doesnt seem to bother him atm, which is good. he is a headstrong little chap (ie. very naughty, disobidient, stubborn etc as you know !) so i am hoping this will help him when he goes to school and maybe other people pick up on it iykwim
hard isnt it? but nothing is going to change matters so we just have to do the best we can
His Positive reinforcements techniques are brilliant and his Maklaton signing is better than mine