When she said "Maine bhi bohot kuch khoya hai... apna pyaar bhi... tumhaari wajah se Bela" , my first thought was that it was Vikrant. But as she continued speaking, I became confused. While I think with the next happenings, Bela will think the person is Shaan, the Vikrant theory could still be true. It could be a plot OR if as someone said if Shaan is a snake charmer and has charmed Vish, she could have blurt out the truth in her 'intoxicated" state.
There certainly is more to the story and I too think that night probably has some twist which will be revealed later. It could very well be that Vish and Vikrant were in it together from the beginning. BUT for this to be true and to make sense, they will have some justifying to do. Like I keep mentioning, I would rather not have Vish be a negative but if it has to happen, there is good potential provided they handle it well.