i'm sorry you feel that SaRa made better chemistry, i speek for myself i dont think Vikrant is mahan for what he did, it was wrong. but what Raj and Sarita did was wrong too. Vikrant agreed to this marriage in the first place for his son, all a child wants is a mother, and if he believes he is getting a woman he chooses as his mother and startes building dreams about having a mother and a complete family. that child is not wrong. if Sarita had not agreed first to marry Vikrant, Abhi could have been told that he cant have sarita as his mother because she is an other mans wife, in time Abhi would understand. that is why the first time sarita refused vikrant was angry but didnt force her into anything. but once sarita got engaged to Vikrant, she in proxy become Abhi mother. to would be impossible for him to understand why sarita refused to marry his father and be his mother. only god know how something like this can effect a child.
vikrant knew the effect this would have on his child and hence demanded that sarita fulfill her commitment, because engagement is a promise and commitment. why should Vikrants and Abhi suffer because of Raj and Sarita's indecision. a decision had to be made and a solution found and vikrant took charge and made the decision for everybody. and i dont think he did not have sarita interest at heart.
Raj is weak and indecisive, he does not know his own mind, he is impulsive and thoughtless, he got engaged to Divya on a wimp to make sarita jealous, how seriously can anybody take a man like that, who does not think twice about using a woman who loves him to make his ex-wife jealous. if i have to list them raj has a hundred faults that does not make him an ideal man.
sarita is better of with out Raj, and so is Divya