If i remember right Ii read somewhere that in the himanshi sana fight jassie had been with himanshi and openely condemed sana .
And after BB he again came out and made a video saying he realised he was wrong in blaming sana alone .But sana has not seen that video .
So whe she saw him being nice to her she got emotional. That himanshi episode has hurt her deep somewhere . She goes berserk.