Windham Henry Quin married Caroline Wyndham, the only surviving child of a wealthy Welsh entrepreneur and fellow MP, Thomas Wyndham of Dunraven Castle, Glamorganshire, South Wales. She saw her role as one of duty towards those less fortunate. The young couple settled in London at first. After the birth of their first child, Edwin in 1812, Windham and Caroline returned to live on the family estate in Adare. She established a School of Needlework during the years of the Irish Famine to provide training for local women.