The promo looks very weird and confusing but I don't think Sai is abandoning her kids.
She has repeatedly said that her children are her life..Why would she leave them?
I don't have any idea about how things are going to unfold,but according to me she won't even let ho of Vinu let alone Savi.
How she will do this...I don't know but they are bringing Sai to the forefront..This is the first Sai centric promo I guess..In other promos either Virat or pakhi will be the narrators.
The whole bumper April is about the mothers and children right..Alphabet and Aunty.
I am somehow sure that Sai isn't sacrificing her children..something else will play out...Direct narrative might even show her losing control or failing ..but the track will end with her gaining her children.
I feel so because Sai is the character they have protected and Vanku will not let her fail as mother..It might sound too optimistic but this is what I feel