It will all fall into place hun...I can't tell you specifically how....but it will ....Both DD and DS1 are mummies kids, because DH works overseas, 6 weeks there and 2 weeks back home...with DD - well she was pretty jealous when DS1 arrived and it was difficult...DS1 is also a mummie's boy and I was worried that it would affect him badly but no he has turned into a fantastic big brother, lots of cuddles and kisses and protectiveness for DS2. DD is now DS2's little mummy - helping me with big girls things which is just gorgeous. It truly is magic watching your little ones all interact with each other and slot into their little 'roles' in the family. I know you are stressing about it, but it will work, everyone will find their niche, it will take maybe a few months but it will be just great. Good luck. x