Well, there is one assumption for my analysis - Both vikash and shilpa are not doing as per bb's script' (and if it is script then I am a FOOL.
As we all know what is happening between both is primarily because of their history, not due to something which has happened in the BB.
I feel Shilpa's one point agenda is to make Vikas accept that what she was wrongly ousted from the Bhabhiji serial, she was victimised and channel, producer etc. did injustice. She thinks this is the best opportunity for her to prove herself innocent and victim, as outside it would not be possible for her to do it.
First week she tried it hard to harass him, however Vikas got support from Heena and co. and in second and third week she could not do anything further. She realised that she need more people with her (apart from Arshi and Akash), she developed good relations with Heena. Heena is critical as she is popular outside, outspoken and has capacity to tackle such situations. She is also goody goody with other team members. Another example during first week she was kind of against Hiten for being friend with Vikas, but she rectified it, saved him and she has not taunted against Hiten after first week (while in first week she voted for Hiten, got angry with him and there was another third instant). During task, she ensured good relations with all, even sacrificing game.
She is trying hard by all means she said yesterday vikas that if you confess it, she will not do anything to her. She said vikas how do you threaten people? She was not ready when Vikas wanted so tell something during dining table. I think she is not fool to understand that she is going overboard, but this is a vicious circle she needs apology from Vikas, that will make her image good outside which is her ultimate goal.
Well, but Vikas is ready to sacrifice everything (mental torture), but not accepting anything...I am not sure whether he was culprit or not, but he is not going to accept it, and for Shilpa she has invested a lot for this, I think she has reached a point of no return.
Well if both are right (some body else have ear poisoning one of them or both) both are right for their action, though Vikas is suffering and worth pity. If Vikas was wrong, Shilpa is just taking revenge and if Shilpa was wrong she is playing horrible unethical game.
I know Shilpa must have gone through lot of trauma during that phase, no support, tarnishing image, no work etc. ...I also feel that during such period even if people are wrong they feel victimised (I only asked for some price hike, I only did few things wrong in set while for others it could be unprofessionalism or tantrums).
But shilpa is losing it, she has not been able to make vikas confess anything, also she reducing her fan base...not good for her.