Geetika Sharma committed suicide a month ago in her Ashok Vihar residence here alleging harassment by Kanda and a senior colleague Aruna Chaddha, who were arrested by Delhi Police later. Kanda and Chaddha are in judicial custody.
Nupur was vice president in the now-defunct MDLR Airlines in which Geetika was an air hostess.
Nupur was questioned as Geetika had earlier filed a complaint against her and another colleague Ankita in Goa alleging that they stole her laptop.
After the suicide made headlines, Nupur had levelled allegations against Kanda and Chaddha.