When the widowed Martha Dandridge Custis married George Washington she brought her two children to live at Mount Vernon: John “Jacky” and Martha “Patsy.” Sadly, her daughter died of consumption in 1773. Jacky was a bit wild, married young, joined the army and died of camp fever shortly after the battle of Yorktown, leaving his wife and four children. The two oldest children stayed with their widowed mother. The other two—George Washington Parke Custis, called “Wash,” and his sister Eleanor Parke Custis called “Nelly”—came to live at Mount Vernon. George Washington officially adopted his two step grandchildren.
G.W.P. Custis married Mary Lee Fitzhugh and their daughter Mary Anna Randolph Custis, the only one of four children who reached maturity, married Robert E. Lee. In 1826, GWP Custis admitted paternity of a child born to a slave who had once resided at Mount Vernon where she served Martha Washington. During his lifetime GWP Custis put down his recollections of George Washington and life at Mount Vernon. After his death his daughter published them in a volume that can be read online. Here is an anecdote he recounts that occurred at one of Martha Washington’s levees.
Mrs. Washington’s drawing rooms, on Friday nights, were attended by the grace and beauty of New York. On one of these occasions an incident occurred which might have been attended by serious consequences. Owing to the lowness of the ceiling in the drawing room, the ostrich feathers in the head-dress of Miss [Mary] McIvers, a belle of New York, took fire from the chandelier, to the no small alarm of the company. Major Jackson, aid-de-camp [sic] to the president, with great presence of mind, and equal gallantry, flew to the rescue of the lady, and, by clapping the burning plumes between his hands, extinguished the flame, and the drawing-room went on as usual.
Custis wrote that George Washington attended his wife’s drawing-rooms.
[He] paid his compliments to the circle of ladies, with that ease and elegance of manners for which he was remarkable. Among the most polished and well-bred gentlemen of his time, he was always particularly polite to ladies, even in the rugged scene of war; and, in advanced age, many were the youthful swains who sighed for those gracious smiles with which the fair always received the attentions of this old beau of sixty-five.