I think Kasturi should wear a modern outfit and completely floor Robbie.
She does not have to do this as she is quite pretty and confident the way she is but she should give a jhatka to Robbie so he realizes that she can look classy in any outfit and then he will never comment about her simple look again.
She should make him understand that she can carry off both Indian and western outfits and that what you wear does not determine who you are.
I hope they will show some such scene when they are in Bangalore. What do you all think?