His elder brother, Frederic Maurice, Prince de Turenne, went to Germany to marry Princess Marie Charlotte Sobieska in Strasburg on 20 September 1723 but, after an accident on 1 October 1723, he died. As a result, Charles Godefroy became his father's heir and, as well, married his brother's widow on 2 April 1724. In 1725 a daughter was born and then a son in 1728.
When his father died in 1730, Charles Godefroy became Duc de Bouillon and Great Chamberlain of France. He was regarded as a rake and around 1744 upset his wife by having a passionate affaire with his own attractive young step-mother, Louise Henriette Francoise de Lorraine.
In January 1745, 'the Young Pretender', Charles Edward Stuart,obtained permission from King Louis XV of France to contact Charles Godefroy as the latter, through his Sobieska marriage, was his uncle.They took an instant liking to each other and soon Charles became part of the Duc's family. However, Charles Godefroy took exception when he found his married daughter to be pregnant by Charles Stuart and, to prevent a public scandal, ended their affaire.
 

Source: Leo van de Pas