After her first husband's death, she married General Staats Long Morris in March 1756.
In 1759, Catherine decided to raise a new regiment as a career opportunity for her second husband, but they were posted to India.
She later went with him to America, where they travelled widely in 1768-9. They then returned to Scotland and set up home at Huntly Lodge.
Morris became MP for Elgin Burghs in 1774, largely due to the influence of his stepson, the new Duke of Gordon.
She died on the 10 December 1779.