if past is repeating then you never know, in a drunken state they might consummate, thats why may be yesterday NK was repeatedly saying that 'woh nahi hua'
Consummation at Bachelor's party? No way. It is a night where the boys have wild fun with hot women. Not their partners.Even if Khushi gate crashes, she will be shocked at what she sees. There might be a lover's tiff etc... but no consummation. I seriously don't believe Khushi will consummate before shaadi. They are going through all this trouble to do things properly. So, even Arnav wouldn't want consummation before marriage at this stage.