In 1939, Stammers married Michael Menzies, then in the Welsh Guards. During World War II, Stammers played exhibition matches on behalf of the Red Cross and served as an ambulance driver. When the war ended, she captained Britain's Wightman Cup team for a couple of years. In 1949, she and her husband moved to South Africa, where Menzies set up Hill Samuel's South African operation. They remained there for nearly 20 years, until he was transferred to New York City to head the office there. She had two sons and a daughter with him.