Exactly, like Shamita said andar yeh halat hai bahar kya Karan ke ird gird ghumti rahegi kya jab woh kaam le liye bahar jayega. This is such an obsessive and possessive behavior going overboard. In the real word this insecurity will turn their relation to very toxic. I mean just look at the fights they have inside the house, they have almost one fight daily related to insecurity.
I personally think that her insecurity and possessiveness comes from the fact that she has a high inferiority complex about her looks and all and thus since she got Karan Kundra who I am sure she thinks is out of her league in the real world, she has developed this crazy kind of insecurity that others are after her bf.