I don't think it was just this task, she started this back stabbing business before this task. This entire thing was arranged for their friendship, not task. I don't think anybody would have a point to raise against Rubina because she is not the one who dumped Jasmin just to go ahead in game.
And her gunda 'not official' bf and gutter mouth of Rahul is making her look miserable because she is standing with them.
Obviously she should play for her own team, not for Rubina. Everyone knows that teams in BB house are made keeping personal equations in mind. She herself made it clear that she wants to play against Rubina in Raja-Rani task and it was more clear that she wish to get into gaddari thing. At least here big boss is not responsible, they just fulfilled her wish...
Not to forget her dhong that before Aly entered, she wasn't aware about real intentions of people and claimed that sabne mukhote pehne the. She knows Rubina and Abhinav from outside, they are neighbors, she claims to know their personal things and threatened them to reveal it, but still she was fooled by their mokhota?😆