I think she is pretending this amnesia as she wants to get close to ahem.
I feel in future she will treat ahem like he is nilesh. Doctor will advise ahem to act like nilesh so that anita may recover and in process she will get close to ahem, don't know how close.
That uncle was bought so he left according to plans. Marriage breakup was also planned, it was bound to be broken as anita had a backup plan for it but rashi made it easier for her.