Riddima should tell Armaan that she's married. Armaan will find out one way or another, and when he does embarrassment, shame, and regretful feelings would just pierce him.
Sid is giving Riddima an option to choose, and not just throwing himself on her. I know it's hard for Riddima, but she chose to marry Sid in the first place..
At times I feel horrible for Armaan, and at times for Sid...especially in today's precap, w/ the mangalsutr and all.
We just have to wait and watch...