Answer: Fetishistic Disorder
Fetishistic Disorder is an intense sexual arousal that triggers from nongenital body parts or some inanimate object which are not typically considered as sexual. In above mentioned case, Darshana is also experiencing fetishistic disorder since she is aroused by object lke athletic shoes which is not typically considered as sexual object.
Fetishistic Disorder is condition in which there is continous dependence on such objects for sexual arousal and the syndrome has caused significant level of functional impairment and distress.