I love watching old episodes over again from the start...while watching I realize that Sid has kept all his promises that he has made to Roshni even after taking ulta pheras. Everything he has said in the past to her he has not moved away from.
He loves to see her smile. He said that to Roshni before Bablu Chachu and Pratima return home. He tells her that he gets happy when he sees his Roshni smile. Recently, when Raj was feeding Roshni at the end of that scene Roshni is shown smiling and that too after a long time, seeing her smile like that after everything that had happened brought a smile onto Sid's face as well.
Sid promises to never leave her and to always be there for her. He tells her that after his bomb blast accident. Even after her accusation and her hurting him with her words. He has not left her. He has done everything to protect her from any troubles. He saved her from the reporters, saved her from the mess at the patels in front of his family, protected her from being hated by Beeji, put her to bed when she fell asleep on the floor, and even bandaged her hand after she burned it.
He might have taken the ulta pheras but he is still keeping all the promises. He is around her like a shadow protecting her and trying to keep that smile on her face one way or another. Why is he doing all this, because deep down he knows how much she means to him and that he still loves her.
Now that Sid will be arrested, I really do not think he will hurt Roshni by assuming she had anything to do with it. He has never doubted her about anything. He has been doubted and blamed by her directly. If Simran blames Roshni or anyone else in the Khurana household blames Roshni of getting the complaint written up then I believe Raj and Sid will back her up and stand up for her. Roshni will herself fight to let them free, she will even fight with Yash and DD for filing a fake complaint with out asking her about it. I am looking forward as to what actually happens. But as for Sid he won't blame Roshni, he knows his Roshni very well. She might have hurt him with her words but she would not go to this length at all.