Confused souls

I'm completely confused on how the story line will progress. It is sure that DD won't let Sid come close to roshni. But how come he was present at the party? He also seems to know about DD's husband before roshni. Also on the sbs, when her husband was scaring roshni, DD called Sid for help. On that scene, roshni also looked calm, no worries that her husband divorced her. So will she go back to her old imature self and start hating Sid and try to move ahead in life. Also on Instagram, nia was wearing a yellow sari. What was that for? This questions are confusing the hell out of me. My head will soon explode trying to find answers of these questions.

till now it is evident she will not hate her

I think before Roshni's dad and the party I think they might come to know about Sid's sacrifice. Either they won't tell Sid they know to let him tell them himself. Or they let him know that they know but we are being told that they do not know yet.