Who are we to decide. If it is fake, they will go home and never see each other and we will move on. If it is not, they will be like the jodi from BB13 who were together till the end (at the time of Shukla's demise, not saying that this jodi will have the same ending but just stating about BB relationships). So, it is none of our business to assume things and comment happily/violently about someone's relationship based on one hour +/- episodes. We have to assume that these fake/real relationships are being watched by families (remember that Paras mother did like his relationship) and they know if a relationship is real or fake and somehow let them know of this.