Marie gave birth to two children: Irène in 1897 and Ève in 1904. She was a devoted mother taking care of her daughters' intellectual and physical education.
However, she had her concrete ideas about child-raising. She kept a close and careful eye on her children's abilities and capabilities, and took notes in her grey notebook about Iréne's achievements in the field of mathematics and Éve's successes in the world of music.
The greatest shock in Marie's life was when her beloved husband was killed in 1906 in a car accident. Lost in his thought, the careless Pierre was struck by a horse-drawn vehicle. From that time, Marie dedicated even more time to her research works in order to direct her thoughts away from her husband's death. The greatest support in raising the two girls was given by her father-in-law, who remained with the small fatherless family even after his son's death. With his quiet and wise, however, cheerful attitude, the elderly Curie had a positive effect on the widow and a powerful influence on his granddaughters' intellectual education.