I agree that Krishna's future won't be as jeopardized as Pinky's, if TTS's plan suceeds.
One, as you mentioned, professionaly she is very strong and has an outstanding career, which strengthens her social position. This position will not be as affected as TTS thinks. She would be injured but socially she would be able to bounce back in little time.
Two, there are two different cases here. Pinky was humiliated since Pintu, the groom, wilfully walked out of the marriage. Huge embarrassement for the family and the bride in this case. In Krishna's case the groom is going to be kidnapped. So its not really the same and no one can point a finger at Krishna or her family for the incomplete marriage.
Although what happened with Pinky on her marriage day was really sad but to be honest she along with her family are equally responsible for the fiasco along with Tuntun. So here, no sympathy lies with her or her family.
Pintu has not been able to achieve anything major in life career wise, untill now but that does not necessarily mean he cannot and would not. So Krishna's mother can't really predict Pintu's future.