To everyone surprise, what had been expected to be an unhappy union turned out to be a marriage of love and happiness. With the birth of her children, Élisabeth Charlotte showed great maternal instinct and a naturally caring character. The marriage produced thirteen children, of which five survived into adulthood. Three of them died within a week in May 1711 due to a smallpox outbreak at the Château de Lunéville, the country seat of the Duke's of Lorraine.