Pulling my hair out!!

[Crayola kiddies]

I had a parent pull that card on me a few years ago .... " he's acting like this cause if the new kids and he's not getting the attention that he's used to" I just told her that life is always changing and children will adapt and her child will too. And he did!
I would sit the 4 yr old down and with your stern face read her the riot act .... Tell her how it is at your house and what happens if the rules aren't followed. You gotta set the bar high right from the beginning. The 19 month old needs a firm hand too ... Give him consequences for his bad behaviour every time..... The first week or two will be tough but it will get better as they realize you mean business