I do wish Taani's choice of career is not dance at this point.. but if the theme of the show is "dance", I'm guessing they can't move away from it.
I don't think Taani taking up dance (if in case) will be shocking for Rey as such.. he might be happy that she too will pursue dance. He will be shocked if its dance.. and with some other group maybe? Dunno 😕 Is this related to NDC, by any chance?
Another scenario could be - Taani expressing her desire to take up dance, and the sole purpose of this is to only bring a change of perspective for Papa Shekhawat, so he accepts Swayam's choice of career and also remains impressed with Rey. Rey will be shocked if the scenario comes up and he obviously has no clue about this development (owing to their recent differences)