Madhav is a kid, and kid are closest to their mothers, so its not a shocker that he is closer to Vividha, and he has seen Vividha's inclination towards Atharva, which made it easier for him to accept Atharva as his father. Also Madhav has always been scared of suman and disliked her, and when Atharva was hang around to be killed, Madhav probably witnessed everything that how the "Uncle" who had saved him was actually a victim of the same woman whom he loathed. These things do affect kids, and Madhav is a smart kid.
Just because Madhav and Atharva are not breaking walls and slapping around vividha does not mean that they are not hurt for Ravish, not every body goes hysterical in grief, they both are strong boys and Atharva knowing how practical he is he is obviously not going to sit and cry with red eyes while his wife is rotting in jail, that is not what any man would do. When Baby Atharva was assumed to be dead and cremated, only Vividha and sujatha were going ballistic, Ravish was not crying and not even calming down sujatha or vividha, that time people did not say that he did not love Atharva, even suman was pretending to be upset while she thought Baby Atharva was a parasite. The V-clan was all normal and not even shocked that some body so close and respectful like dadaji killed Atharva.
Here Atharva's wife and Madhav's mother is in jail and people expect them to not be with her and not speak for her and behave Ballistic? How real.
PS: Unless you have a solid argument do not quote me please, this comment is solely based on the TM's post, and I am not bashing anybody so stay away.