Even if babita is his real mom, it is still possible to show her doing what she does now bcoz sadly some parents are narcissistic, would gaslight & guilt trip their own kids. Such parents are very good in meddling in their son's' marriage life and make sure their son disrespect & distrust their own wife.
They would only be happy and amiable towards their kids, if they always kept in priority status and act according to their preference.
Babita was dotting on her son but the moment she realized that he has started giving his attention to another women in his life that is not to her liking, she didn't mind that it would make her son a villain to the chiknis fam when Ishika thanked VA & shifted her pre-engagement arrangement responsibility on VA(Harsh still hates VA bcoz he believes that VA pretends as good but invited them on purpose to humiliate them).
It would be good to show babita as a real mom, else it would support the impression that real parents will never think or do such things to their kids.
He stole money virats becz they wanted take badla from amu and she was virat's personal banker.