Kohli, 67, sister of Singh's wife Gursharan Kaur, was suffering from breathing problems for several days, they said from Hubli, about 420 km from here.
Kohli is survived by husband Harinam Singh, an automobile businessman, three sons -- Harmeet, Manmeet and Parvinder -- and daughter Radhika.
Deccan Herald is on WhatsApp Channels| Join now for Breaking News & Editor's Picks