Its natural soham won't accept Archu and manav as his mother and father. He grew up with Varsha thinking as his mother and balan as his father.
Even Teju and Ovi did the same with Archu.
But Soham case is little easy. Varsha didn't tell anything bad about his father and mother. He is totally unaware of a couple as his parents. He will take time to adjust to new truth.
One truth gives strong hope to Archu and Manav. Balan is not Varsha's husband. Soham still not aware of that. When he comes to know that Varsha was living with Balan and her husband is someone else then he will surely change his feeling towards Varsha.
Balan also not a good person. He will surely try to use Soham to extract money from Manav.
Soham has good nature. Soon he will understand real love of Manav-Archu. Purvi may help him to see the reality.
everything won't happen in a day. there will be more of emotional scenes from every member of the family.