Fourteen of her children predeceased her. Lord George Simon FitzGerald (16 April 1773 – May 1783) was recognised as the son of Lord Kildare and Emily Mary Lennox, but in fact was the biological child of the Fitzgerald children's tutor, William Ogilvie. In 1774, a year after her husband died in 1773, Emily outraged society in Ireland by marrying Ogilvie in France.
Emily had fourteen children who died before her. Lord George Simon FitzGerald was recognized as the son of Lord Kildare and Emily Mary Lennox, but it turned out he was actually the biological child of William Ogilvie, their family tutor. A year after her husband's death in 1773, Emily shocked Irish society by marrying Ogilvie in France in 1774.