I'm sure it's perfectly normal but I just don't know how to handle it. My 2.5 yo is jealous of my 3 mo. Before she was always nice to him but just angry at me but now she's getting worse. When I try to put him down to settle him for naps she comes shouting that she wants him so he can't sleep. Today she even tried to hit him while I held him . She hates me feeding him. How can I stop this? I have a stair gate on the door to the room he sleeps in but she can still open it and shout. I just end up shouting at her