After the death of Ranjit Singh, Jind Kaur and her son lived in relative obscurity under the care of Raja Dhian Siṅgh at Jammu.On 16 September 1843, after the assassination of Maharaja Sher Singh and his wazir (vizier), the army proclaimed the 5-year-old Duleep Singh as sovereign.She was renowned for her beauty, energy and strength of purpose and was popularly known as Rani Jindan, but her fame is derived chiefly from the fear she engendered in the British in India, who described her as "the Messalina of the Punjab", a seductress too rebellious to be controlled.After the assassinations of Ranjit Singh's first three successors, Duleep Singh came to power in September 1843 at the age of 5 and Jind Kaur became Regent on her son's behalf.
After the death of his first wife he married Ada Wetherill, daughter of Charles and Sarah Wetherill, and had two more daughters.
The terms of the Treaty of Lahore, signed in March 1846, were punitive but the seven-year-old Duleep Singh remained as Maharaja and Jind Kaur was to remain as regent.
However, in December, she was replaced by a Council of Regency, controlled by a British Resident, and awarded an annual pension of 150,000 rupees.
She was temporarily buried in Kensal Green Cemetery and cremated the following year at Nashik, near Bombay.
Her ashes were finally taken to the samadh (memorial) in Lahore of her husband, Maharaja Ranjit Singh, by her granddaughter, Princess Bamba Sofia Jindan Duleep Singh.