Yes that is mean of Nausheen to behave in an unprofessional manner just to kick out Kumud (Aashka) just because she does not want to play mother to a 25 year old. I had high regard for Nausheen but after this I think Manasi was a better person.
Maybe ekta should not bring back Nausheen if she is going to kick out Kuumd. There is nothing else in the show left.