since we saw hukum in haveli before G came there n certainly for his selfishness he can do anything to get his way even if its to harm his sister then it can b him but he was instructed by someone whom he met before in the haveli so it can b Jiji who is against sugvi. Also vikram said he will do anything n everything to keep his love to him n to keep reva a secret, so it can b he also. But CVs can surprise us all as they did always n introduce a third person in the show.