Jaising argued several cases relating to discrimination against women, including Mary Roy's case, which led to the grant of equal inheritance rights for Syrian Christian women in Kerala and Rupan Deol Bajaj, the IAS officer who had prosecuted KPS Gill for outraging her modesty. This was one of the first cases of sexual harassment, successfully prosecuted. Jaising also argued the case of Githa Hariharan in which the Supreme Court in a Bench presided over by Chief Justice A.S. Anand held that under Hindu law, the mother was also the "natural guardian" of her minor children, so that the children could also bear the name of the mother. Jaising also successfully challenged the discriminatory provisions of the Indian Divorce Act in the High Court of Kerala, thus enabling Christian women to get a divorce on the ground of cruelty or desertion, a right which was denied to them. She has represented Teesta Setalvad, in a case where she was targeted and accused of embezzling money.