On 16 November 1671, she was married by proxy at Metz. In order to marry she had to convert to Roman Catholicism. Elisabeth Charlotte would be very close to her two stepdaughters Marie Louise and Anne Marie. Her husband was gay but the couple still had three children but one died in infancy. After the birth of their daughter Élisabeth Charlotte, the couple mutually agreed to cease conjugal relations. Philippe turned to his lovers, and Elisabeth Charlotte to her writing.