However, it was on this occasion that Clermont learned that he would not be escorting Marie to her bridegroom during the wedding. Meanwhile, the Duchess of Montpensier had sent out invitations to the wedding in her name alone, omitting not only mention of Marie's father, but also of her grandfather, "Monseigneur" the Count of Paris who, until then, had largely sided with the Duchess of Montpensier in family matters and had consented to his granddaughter's choice of a spouse. This prompted father and son to join in calling for a familial boycott of the nuptials. Clermont and his father refused to attend the wedding but Marie proceeded to marry civilly at Dreux's city hall on 22 July 1989, and religiously at the castle of her mother's brother in Germany, on 29 July 1989. All but two of Clermont's eight siblings also boycotted the ceremonies, but his sister Diane (wife of Montpensier's brother) hosted, and Clermont's mother, "Madame" the Countess of Paris, was a guest at the religious wedding.