yes of course she can be upset but she knew exactly what she was getting into. And she's from bollywood where this kind of bullying and bitchery is apparently common place so she's already used to it.
These people don't just decide on a wim to go into big brother, maybe the first season, but then that was all quite inteligent with jack dee etc, apart from vanessa phelps losing the plot, but they, or their agents, know what kind of publicity it will give them, that's why you never ever see decent celebrities in there because they have too much self respect to degrade themselves like that.
Channel4 should be editing out this bitching, it's one thing it happening but it's quite another condoning it being played live on television, but they don't edit it out because if they did they wouldn't get the viewers.