Regarding Talli--I don't know if Gulaal is pushing Talli in hopes of a Kesar/Talli match. I think even she is probably over that by now.
I think she is just using Talli as the go between. You know, that classic comedic track where two people use a person to convey messages to each other, because they are too angry to directly interact.
Except here, it's not comedic and Gulaal is doing it to avoid contact with Kesar, as well as a barrier between her and Kesar.
She should spare a thought for Talli, though. And think how hard this is for her. But no one is thinking that much. Not Gulaal, not Kesar and not Sudha. Talli is just caught in between them.