I really like Gayathri demostrating her anger. I think this is way better than someone keeping those feelings to themselves and not saying anything. Its good to always say outloud your feelings and get done with it.
Both SP and Radha have committed grave mistakes. SP being married, had a relationship with another woman. Radha - swapping the babies at birth. This is a big crime and because of SP and Radha's doings, now Gayathri, Yash and Akash are suffering.
Gayathri should take kali ma form and give lecture to both SP and Radha. She should leave the house and SP should realize his mistake, beg her to come back.
Yash and Aarti should understand how Gayathri would feel. Would Yash be ok if Prashant stayed near Aarti and wanted to raise Ansh together? Would Aarti be ok if Arpita comes back? They should know its not possible for one person to accept their life partner's love with another person.