Ranveer is fighting against injustice of Vasu, for him truth and justice stands above every relationship. He is a true follower of our GITA....This is not new for him , when he got a slight proof against Indrajeet,Vasu, Chhotima about Dadaji's mystery, he never hesitated to step backward. He knew that he was trying to get justice against the injustice done.
For Ragini, its all to satisfy her own thoughts, her own ideas. She is upset and behaving harsh with her father, as she feels that Mamaji is not doing right by providing shelter to Sadhna. Mamaji should support Ragini and hate Sadhna, as Ragini wants.
Ranveer is fighting for a right cause and indeed doing a favour to Vasu, by standing like an obstacle between her wrong deeds and family happiness, he is saving Vasu from committing such a crime for which even God will not forgive her once it is done. And if Vasu's will is done, then all three--Sadhna, Alekh and Mallika three lives will be spoiled.
If Ragini had shown this attitude to her mom or at least if she had politely controlled Kaushi and spent sometime diligently to bring back Kaushi's thought process to the right track, many wrong doings could have been avoided.
Ranveer is doing it for the sake of his bhaiya-bhabi whereas Rgaini is doing to establish her own thoughts right...Ranveer path is of positivity and Ragini's of negativity, and as we all know, negativity does not stand long...