She was the mother of Prince Basundhara Bir Bikram Shah and Princess Nalini Rajya Lakshmi Devi.
She was the daughter of Arjan Singh Sahib, Raja of Chhatara, Barhgaon and Oudh and his wife, Krishnavati Devi Sahiba.
She and her husband had two children: In 1948, Erica Leuchtag, a German physiotherapist, who had been serving the royal family of Patiala was invited to treat Queen Kanti.
Leuchtag also treated the King and reportedly befriended many members of the Nepali royal family including the junior Queen Ishwari and the Princesses Nalini, Vijaya and Bharati inside the Narayanhiti Palace during her time in Nepal when the royal family was not allowed to leave the palace by the Rana rulers.
The two Queen Mothers laid down the foundation stone on June 25, 1958 and even personally donated 375 ropanis of land in Lalitpur designated for their widowhood by their late husband King Tribhuvan.