good post mera di, 👏
as for K's behavior, i think the CVs have given us ample explanation...K sees his mother accepting P wholeheartedly , he was suspicious of his mother at first but his suspicions vanished the moment he saw his mother writhing in pain when SS beat her for supporting P and he felt guilty after her emotional speech of getting her son's love and care at last...he thought n thought of it all night (bec he is 'feeling' now how he had never looked at his mother who is so loving n caring to him n his babu) and felt more guilty of never being a good son to his mother , never holding her hand when she was in pain and all that...and he decides never to let her suffer more...
then he sees that his mother is always trying to cover up his babu's mistakes, warns even him not to scold her...and he is getting a doubt (ofcourse planted by amma) that maybe P is not liking his love towards amma or is 'jealous' of it...he is not doubting her love, rather he is doubting her possessive n jealous love...
then he hears from P that amma is trying to bring her down in SS's eyes while another story is firmly planted in his mind already by a caring mother...then he sees P saying the 'ashtami' thing which flared SS's anger and provoked him to beat amma again and he hears that P had already known of the fish-dish part but only said it when all were present...why? his mind gives him the answer based on formal events- P said that amma is trying to show her in bad light in front of SS, so P now deliberately wanted amma to get humiliated and beaten by SS... he is bound to think like that...bec he is not even considering the possibility of a foul play from amma's part, bec she is supporting P even though she is getting humiliated and beaten...and like amma said to P, K is like that only, he gives everything when he loves, but when he is angry, nothing u do cab make him understand or relent...and we know how K is when he is angry or upset with anyone, he could be very mean , infact meanest of mean ...amma is playing a dangerous game with K...😕 😡 and i am sure K will be at his meanest to amma when he comes to know about the truth of her fake face...