So kartik felt khalipan in his life after sirat left...
Kartik was like....'phle bhagwan ne meri naira ko chin lia ab meri dost ko'.... So somewhere he has already given that place of naira to 'sirat' just switched that term of love to 'friendship'... Waah ... Mtlb he has two kids to take care, his father and mother is there ... But no he is feeling 'akelapan' in his life bcoz his so called friend 'sirat' has denied to meet him or talk to him coz she has to take care of her husband who was literally on a death bed ... Waah kartik waah.... now even kartik in his dream , talking to naira about sirat.... Wth... Naira k aatma ko kartik ne yaad kia sirat ko discuss krne k lie .. baccho ko nhi
Kartik's 'friendship' is so obvious that when kartik told his son that they can be friends.... He immediately said 'wo to sirat hai aapki bff'... While when naira was there(Mumbai's track), kartik kairav bond was treat to eyes....even though naira was there in the same building, kartik's attention was divided between the two...and kartik managed that very well..... all that breakfast prep for kairav+getting ready with him+going with him on beaches ,ice cream parlor etc
But here, after sirat's left, he is all that bechara, akelepan ka mara insaan person ,he has become.... Instead of checking what his son ate in his breakfast, what is going in his life...spending more time with him.... He is spending time in his bed all being upset ...