Details from Allahpundit at Hot Air, who notes:
Her first son died in a car accident when he was a teenager, and if you’ve read “Game Change” (or any of the more salacious excerpts), you know that she and John had had a stormy relationship even before Rielle Hunter entered the picture. Although they were comfortable financially, in many ways she had a tough life. I hope she found some peace at the end.
More here, from ABC.