Mina Miller met Thomas Edison at the home of the inventor Ezra Gilliland, a mutual friend of her father and Edison, in Boston in 1885. After he taught her
Morse code, he used it to ask her to marry him. They married on February 24, 1886. At age twenty, the new Mrs. Edison became a stepmother to Edison's three children, Marion Estelle Edison (1873–1965), nicknamed "Dot"; Thomas Alva Edison Jr. (1876–1935), nicknamed "Dash"; and William Leslie Edison (1878–1937). This was not an easy task. Mina and her husband went on to have three more children, Madeleine Edison (1888–1979);
Charles Edison (1890–1969); and
Theodore Miller Edison (1898–1992). As Thomas Edison supervised his laboratory down the hill, Mina hired and supervised a staff of maids, a cook, a nanny and a gardening staff. She even called herself the "home executive". After 1891 she, not her husband, owned the house which protected the house from being seized to pay Edison's debts if he went bankrupt. == Charitable work ==