As for business ethics, an employee must be respected and no feelings of love should enter.
Maybe this dichotomy is making him restless.
I dont have any problems seeing a stronger Suraj. Who can stand upto false notes and goes for real separation which will free both of them from celebrating festivals meant for real husband and wife.
Sandhya asked him not to help her again and again but let her be alone. Suraj maybe taking those instructions literally. On top of it, he has seen the divorce papers.
As for his humiliating her in front of the family, the occasions are arising there.
Dont forget that all this is going to benefit Sandhya and shatter him.