I doubt these guys have the bandwidth or budget for an actual legal custody battle. It's probably just in ZA. Savi may choose V because she will get to be with Vinu too but very quickly will realize that she cannot be happy without her aai. IF said V will see that too. So separation isnt permanent. But it'll be heartbreaking that Sai has to see Savi pick V/Vinu or be separated from her even for a single day.