I'm 90% sure that Kastur will be angry with Mohan as this is really a big damn thing. Mohan married her for his own selfish reasons, this is a big thing. No way should Kastur forgive him in mere seconds.
I actually predicted that Kastur will sacrifice her love for bringing Sia and Mohan together. But thank goodness it won't happen. After watching Kastur in today's episode and the way she stayed strong, I don't think she'll forgive Mohan easily. Or perhaps she might not believe Sia and let it go like she did about the degree matter.