Ganga is making Abhi and Mannu do their homework.
Why would Shivam be sitting there with them? His mother is there to help him and ensure that he does his home work.
Why is there any doubt about Shivam's schooling - quite obvious that he goes to school.
Unfortunately we are not getting to see much of Anandi and her son because the CVs are more interested in creating a story arising from Abhimanyu and Shivam equation.😛🤢🥱 and also because a lot of time is taken up by kahani Nandini ki.
May be Mannu knows that he has two fathers or rather knows that J has adopted him and we did see a strong bonding between J and Mannu from beginning so he may not be an insecure kid.