Posted:
He's doing exactly what Roshni's doing, albiet with a negative character than a lookalike.
To Roshni, Sid is Raghu and she is getting close to Raghu in order for her plan to make Shabby believe that it is Sid in real life.
Sid is getting close to Shabnam in order for his plan to trap Shabnam and clear his name from the mms scandal as well as expose her as a whole.
Now the difference is Roshni's faking love with someone who knows she's faking, whereas Sid is faking with someone to make them fall in a trap.
But...that doesn't make him a bad husband unless he crosses the line and kisses her or sleeps with her. Plus he's not cheating on Roshni emotionally either.
I know Roshni will get hurt, but she'll come around it (if he doesn't cross the line that is). It's safer for her not to know the plan.
