Wouldn't it have been better to put a trace on shyam, they managed to accuse him so its not like their brains weren't functioning at all.
Even now, khushi went off into a dark alley, following a man she knows has tried to hurt her in the past. Very smart move.
Arnav and khushi should have told anjali the truth about Shyam. They should have let her make the decision that effected her life herself. What right do they have to decided who she spends her life with. The mans a cheat, he purposely set out to device khushi and her family and would have gotten away with it. It wasn't a mistake. And then once he was caught by Arnav he purposly mislead him and tried to manipulate his way back to khushi.