sister killing sister

If you remember the last promo sister(Araina) wants to kill her own sister(Prateeksha).Look closely is it because
1) Araina comes to know that Shashank and Prateeksha were responsible for Sumo's death
2)Prateeksha Married Ronak
3)Is both incidences connected in some way or the other
4)Is it some other reason
All the things are pointing at something that Prateeksha is guilty about something and Araina keep bumping with each other every now and then.Araina might come to know the truth about something that will make her take that step to kill her sister Prats.Definitely I think by then Araina is still unaware she her sister.

Ye i tink it was 2 atract..But pratz dservz 2 b held at gunp0int 4 maryn arainaz love..N0t 4 da sum0 ting,dat was an acidnt..

But usually whatever they show in a promo it takes sometime for that big incident to happen like for example the promo of astrologer's prediction was shown for a long time and prediction came true after several episodes.So I am thinking araina will also come after prats after several episodes

Originally posted by: sunaina02

1. The promo was shown to attract viewers and may not relate to the story at all

2. Creatives are still writing the story.

After seeing the latest Promo it is sure Araina is going to come after Prateeksha.Probably Shashank is going to tell Araina about his love story

i am sure once araina will find out that pratz is her sister she might not do it but i am sure it will be too late