It seems that the girl is very smart, she knows how to manipulate people...she sensed at once Nidh is a compassionate person by nature, when she hid behind a wall after stealing, some people were looking for her, she signed Nidhi not to tell them, Nidhi saved her & that led her to hide in the dicky of Ashu's car & reach in MM... Again when she fell in front of Ashu's car,the way Ashu took care, gave her first aid, talked affectionately she felt the warmth of his soft heart at once...even at MM she quickly comprehends that these two people adore kids...Ashu's endearing gesture combined with Nidh's simplicity & compassion make the girl feels free with them...she was just fully exploiting the situation & taking the advantage of their kindness...when Ashu took her to the police station, police advised him to send her to the orphanage, she hugged Ashu & begged him to take her with him...she knows the tricks how to soften ones heart... even when Nidhi was irritated with her blunt talking, sitting on the sofa quietly, Khushi just went to her to say..she must be thanking god for sending her in their life...after hearing this how could Nidhi being angry with her? ...Khushi knows when & where to say what... ...may be being a street girl she knows the means to survive very well..