Usually jealousy tracks are introduced in 2 scenarios
1. When someone, esp male lead has not realized his love for the girl. In such a situation, seeing her with another male, will arouse jealousy in him and may lead to his confession. This is absolutely not the case with SidNi😕
2. When there is a major fight b/w the couple and they are hiding their love. So if the hero is so angry with the heroine and don't want to talk to her and when he sees her with someone else, there can be jealousy and he may blast her and blurt out she can only be his, b'coz he love her. This can lead to reconciliation.
Now, this could have been a possibility if Sid was angry with Roshni and then seeing her with Yash may have created a jealousy track. But here Roshni is the one who is angry and to create a jealousy track a new girl should have been introduced for Sid, if u have to make Roshni jealous.
Here, seeing Yash and Roshni, Sid may feel insecure and his fear of loosing Roshni would increase. But how would that help SidNi reunion??😲 Making Sid jealous or not won't have any impact on Roshni and SidNi relation. Watching Sid anger on seeing Yash and Roshni together may not melt Roshni's heart. May be in insecurity Sid may do something which may even complicate SidNi relation. And with Yash in frame, it would take more time for Roshni to accept Sid back, b'coz once she commits to Yash, she would hesitate to hurt Yash and go back to Sid
Thus, my estimation is that it is not a jealousy track that is being planned, its some sort of a complicated love triangle, where all 3 are going to suffer. The only thing what can happen with this track is pushing Sid out of Roshni's life, but I doubt whether Rosh, Yash and DD would be able to do that b'coz Sid won't give up soon😕 I think the purpose of this track is to prolong SidNi separation
So, what do u guys think, will this love triangle track turn out to be a jealousy track or something else??😊