The Dockers were invited to the christening of Prince Albert in April 1958. They brought Lady Docker's son, Lance Callingham, with them, but he was not allowed to attend. Later, at the Hôtel de Paris, Lady Docker, still furious about the incident, tore up a paper Monegasque flag that had been at her table. In response, the government of Monaco had her expelled and the Princely Family of Monaco returned the Dockers' christening gifts to them. Through a 1951 treaty with France, the ban on Lady Docker was extended throughout the French Riviera.