Additional Sessions Judge M C Gupta rejected the bail plea of Aruna, who had sought regular bail saying she is mother of a nine-year-old girl, and wanted to take care of her daughter.
The court had granted two month interim bail to Aruna, which expired on November 15.
The court had denied bail to main accused Kanda on October 14, saying the stage of the trial is at the threshold and considering his power and status, his mere presence is likely to intimidate witnesses.
Aruna was arrested in the case on August 8, last year while Kanda had surrendered on August 18.
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They are facing trial for offence of abetting the suicide of 23-year-old Geetika, who was earlier employed as an air hostess in Kanda's MDLR airlines.
Both the accused have also been charged with forgery for cheating and harming the reputation of the victim.
Geetika was found dead on August 5, 2012 at her Ashok Vihar residence in North West Delhi. In her suicide note, she had said she was ending her life due to "harassment" by Kanda and Chadha.