replies coming in a bit. But let me just post this siggy here. I was so excited when they showed this scene cuz I had actually been to the temple of Tukaai when I was little!Here's a short explanation.
When Parvati/Sati came down to earth to test Shri Raam's divinity, she took the form of Sitaji and sat meditating in the forests of what is now Tuljapur, Maharastra. Shri Raam saw her, came over to her, and asked, "Tu Ka Aai?"
That literally means "Is that you, mother?"
Today there is a temple there and the deity is named Tukaai, since Shri Ramchandra himself had given her that name.