Although it will tear his heart, and consequently, ours to see him in pain...I think being the guy he is, he will step away. He has already made Sid a confidante and so knows that Sid is a good guy plus just the fact that Sid, as her hubby, let Ridhz even meet Armaan will hint at Sid's nature even more. Armaan will believe that this is what's best for Ridhz. So Armaan will step out of the way and try to let them build a married life. He may even try to leave Sanjeevani but Dr. Shanky will maybe stop him (as per rumors) and so he will stay. But as fate would have it, Ridhz and Armaan will be destined to "bump" into each other, and share those sensational eye lock sessions and dupatta-getting-stuck situations. Sid will watch from afar, but knows it's not their fault. Then how Sid'll back away, I'm not sure...I think if the cVs try to extend the plot...Ridhz will re-realize the extent she loves Armaan (seeing him physically there makes things difficult and remember it's not like Ridhz is staying with Sid atm..she's w/Naina) She'll go to tell Sid that she's sorry b/c no other man can take Armaan's place in her life, but maybe just then...Sid will have an accident and she will vow to take care of him as he did for her...blah, anything can happen...i'm biting my nails here!