Kaira’s favorite solution when it’s about biological/adoptive children/mother is the Devki-Yashoda story.
They are doing it now (again) to make Kairav understand and at least it makes sense. Krishna (the girl) needs to be protected so Naira adopts her as Yashoda did.
Last time they did it was to whitewash Suwarna’s mistake. When Suwarna without telling Manish gave up her biological son (Aryan?) not to protect Aryan but for Kartik. Suwarna lied to Manish that he had lost his infant son, let Manish grieve the terrible news of seeing a child die. But Kaira idk how twisted it all to show Suwarna as Mahaan.
At least this time mythology/reality is not twisted.