My niece is 2.5 my boy is 1.5 she's horrible bites hits scratches pushes. What am I to do my wife is totally at the back of her sister. My boy is not a wuss he was the takes most of it but tonight the girls left the living room and I hear bang. I run in and my boys crying, I take a look at the situation and realize his cousin pushed off the slide about 30" tall. Sorry I was cooking dinner or else I would have been watching. I'm now fighting with my wife about the situation what should I do. I'm a young parent let me know your experience please. Thanks.