My gut feeling says that:
Pratigya will eventually fall in love with Krishna baba and will be spending some quality time with him.
Then Angad will see them happy and woldn't like it so decides to put his plan into action.He will somehow corner Pratigys and tell her about the kidnapping and try to balckmail (no idea what he wld want).
Pratigya knowing how possessive Krishan is about her and aware of his short comings will hide this from him. She will think he will go ballastic if he comes to know that she spend a nite with Angad. So will try to deal with Angad herself rather than telling Krishna the truth.
Somehow Ammaji will get some idea and try to create doubt in his head. And when Krishna finds about Pratigya's dealings with Angad there will be a rift between then. He would refuse to listen to her and wouldn't trust her. Then Pratigya will take another Pratigya that she will not give up her Husband
What do you guys think? Let me know