I find that DD#1 can be a bit too rough sometimes with DD#2. TBH I think a lot of it is an age thing and there is a huge amount of jealousy there too. I find that if I sit with both of them so they can "play" together then its pretty good - there have been some gorgeous moments lately of DD#1 sitting holding DD#2's hand, or stroking her very gently, or bringing her toys if she's upset. It definitely seemed to make DD#1 more determined to act inappropriately in the early days if I told her not to hurt her little sister, but while I tend to try to ignore her when she does "naughty" things like turn the tv off, I can't ignore it when it could injure DD#2. I never, ever leave the two of them in a room together unsupervsed - even if its just to go to the toilet or something. I have a play pen that I pop DD#2 into so that she is safe from her big sister's attentions.

Its still really early days for your DS yet - 10 weeks is nothing really and its a huge adjustment for him. He will settle down and be more gentle with his little sister. Just keep doing what you're doing (which sounds great!) and I'm sure he'll soon turn a corner and allow you to relax a little.