Hey I m not expert but it’s seems u need to give some time to elder one. Like an hour to play with him or do usual things you used to do before. I know it must be hard . All the best .
My 2 year old changed in behaviour(for a short while) after I had my newborn; I didnt use any punishment ie timeout etc because I knew it was a big transition for us all, instead I tried to have 1-1 time where possible when my newborn napped etc and eventually my toddler’s behaviour went back to how it usually was x
Same here. My 3 yo so aggressive to his brother. I think it’s because he is jealous and for the first 3 years his just being his self and no one else so he doesn’t need share anything in the house including his mum and dad now baby coming and he just feels like everyone is put more care to baby. One day he woke up in the middle of the night and start crying and screaming and I ask him what’s wrong and he said no brother no brother then I asked him back what’s his feeling and he said envy. Then I understand now why he behave so bad lately