When the show began, there were no evident groups, everyone was happy with each other and some minor fights.
Ppl were still talking about Sara Ashmit. Ashmit is friendly to Shweta and listens to her at every opportunity. He dislikes Veena and Sakshi (see the initial episodes).
Enter Dolly. She has her first fight with Shweta. Ashmit takes her to the room, proposes the boycott. Sara is apparently evicted - Ashmit heartbroken. he is the captain at that time. Hrishant convinces Ashmit that everyone is against him and esp. Shweta.
Exit Shweta from Ashmit's circle of friends.
That night Ashmit screams at Shweta for the first time, veena makes her move. She tries to spend time with Ashmit apparently to console him. They spend the night together looking after the Diyas, where veena comforts him.
Next day onwards Veena and Ashmit are a couple. Sara watches it all from the secret room and cries buckets. She comes back to the house and has apparently accepted veena and Ashmit as a couple. But she is waiting for her chance.
Ppl. Veena has been consistently nominating Shweta from the first episode onwards for some reason or the other. Probably she thinks of Shweta as a threat.
Sara's nomination of veena came as no surprise. She has consistently kept away from the group nomination trends.
Whenever something happens in the house, esp. where Shweta is involved, veena and Hrishant try to poison everyone's mind about her. Remember Hrishant claimed in one of the earlier episodes that Shweta was trying to hit on him when we could all see that it was not true at all.
Please let me know if you agree with my reading of the situation or not.