First Lady Mary Todd Lincoln, was never emotionally stable, and was declared legally insane 10 years after her husband's death at the urging of her son Robert. She spent well beyond Lincoln's huge salary, and many suspect she was selling secrets for cash.
*MARY TODD LINCOLN's WEDDING BAND ~ The night of their marriage, Abraham Lincoln slipped on to Mary Todd’s finger an Etruscan gold wedding band. Inside the ring, the words, Love is eternal, were engraved.
Robert Todd Lincoln, the only child of Abraham Lincoln to live to adulthood. This was taken in 1922 at the dedication of the Lincoln Memorial in Washington DC. Robert was at Abraham Lincoln's bedside at his death.