I think ur child is acting up because of the new member fighting for attention with him. It's v v normal. Be extra patient. Love him more, reassure him more. I know it's hard caz u are bf baby but if possible try to have some alone time w him even if it is read to him his bed time story or something - some time that is still just u and him only. Have to just slowly educate. U can scold and beat him a little but not too much and u must explain. Otherwise it will just add on to his negativity to baby
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