I just saw the new promo....
naina goes to ritu and says-"ma'm mujhe aapse abhi baath karni hai..."
"aap rajveer sir se engagement nahi kar sakti kyunki main sir se pyaar karti hoon..."
I think she's only trying to break their engagement because she knows now that ritu was not loyal to her brother...and she's trying to save raj frm ritu...