Even today Raman said, "Uska kahi aur intazam kar deta hum.." ! WHY ????
So what if she's the mother of his kids? Is he going to support 2 wives for the rest of his life ?
Even if Adi leaves the house with Shagun and if Raman stops supporting her, Adi would have to automatically come to Raman because Shagun does not have any money!
Raman can easily win Adi's custody case and completely leave Shagun out of this picture by just NOT giving her any money!