It's not hard to imagine what happened.
Somehow MJ convinced his pathetic family to play with him maybe that he is actually getting dirvorced & everything.
Another can happen. MJ intially introduced Maya only as a bright employee in his family. That's why everyone in first sequence was looking pretty okay & happy.
But first honeke chance Jada hai .
Then MJ made Maya pragy & pakka he threatened her to kill it . Maya seek for help in MJ's family members & Antara maybe gave her some fake promise to help or maybe she said she is getting dirvorced. She is a doormat tho it's not really shocking.
Fir sabne milke uski bajayi hogi. MJ abused her & kill the kid & his friends were maybe helped him.
MJ killed his kid to save his pathetic reputation front of public .👎🏼
Maya ayi wapas uska revenge lene