I think in future mishti will be the one who propose abhir first...but abir will reject her proposal..because of big Ben blackmail..I think big Ben will blackmail abhir to leave mishti or else she will tell kunal that he is parul son..this may be one reason or another one bcz of kunal kuhu relationship acceptance..bigben will put one condition for abhir if he leaves mishti she will accept kunal kuhu relation..in all these mishti will be upset and get angry on abhir not knowing actual reason of abhir reject..abir will be sad inside