IDK if he's faking - sometimes I think he is, and other times not. We saw how he was before he even met/saw Pallavi and it seemed like he really did have memory loss at that time. Or he could just be a master manipulator, but then why wait all that time to find Pallavi/his family and why show us his scenes alone....
Also, maybe someone already showed him wedding pics and told him things. I wouldn't put it past Sulochana to tell him these things to egg him on.
so I had a another theory š¤£
we know Ved and Mandar knew each other before
so it is possible that Ved blackmailed Mandar to bring Pallavi back as his wife so that he could indirectly break Raghav
and he must have showed Mandar proof of his involvement in the illegal drug business to blackmail him
Ultimately, Sicku said that Raghav's customs tax evasion thing can be used against him by Mandar, I'm guessing both he and Ved plan this out together after they lose the 7-day challenge