Mandana was clearly enjoying the task and bossing the others around, and when Ali,Sana Rishabh and er were having their round table conference, the ideas were coming from Ali they were discussing and she would straightaway shout for Prince and the contestant and be like we want this person to do this or quit the job- if she had not done that and let Rishabh do the orders she could justify putting all the blame on Rishabh.
secondly throwing the bone in the water was her idea, Kishwar was correct in saying that you also had the right to stop the tasks from going to far.
She was crying because the housemates questioned her actions and she couldn't justify them- The reason why Rishabh came out looking better even though she tried to shift the blame on him was because when he was questioned about not giving the doggy task to Aman or Kieth he said ' woh mere friend hain' but Mandana despite being all best friends with Kishwar didn't even try to tone the task down but instead made it worse.
I have a feeling she wants them to target her that's why every weekend she cries and/or says ' I am the target'. She's trying hard to be a contestant from the previous season.