Huge hugs , you aren't doing anything wrong Nae. I completely agree with Trillian's post and won't rewrite it another way lol! DS1 was such a chilled out happy kid until his little brother arrived. All of a sudden he was being really naughty all the time, sometimes he'd come up and kick me in the shins while I BF DS2 - it was awful . He'd never seen this behaviour modelled to him, it was just his way of reacting to all the changes going on. He did grow out of it himself over time, in the meantime you need lots of hugs and support . You are doing a great job OK?