As the future King of England, Prince Charles's duty goes beyond his own two sons and wife. The oldest of the Monarch’s children, Charles, has seen to it that he also has a say on the activities that the younger royal members are getting into.

In a bombshell revelation, Prince Charles was forced to step into his nieces Princess Beatrice and Princess Eugenie's personal business.

Royal biographer Angela Levin has exposed the younger Princess’s security cost during her travels in her gap year.

The hemorrhaging cost that Princess Eugenie racked up during her gap year for her security amounted to over $150,000.

This money was taken from UK taxpayers. Levin was quick to explain that all the personal spending for the trip was done by the Princess herself. The economy plane tickets, the hotels and the food, but her security was from the Britons.

According to the royal documentary ‘Beatrice and Eugenie: Pampered Princesses?’ Prince Charles had to step in to stop the Princess from spending too much.

The reported cost of the Princess months of travel in America, South Africa, India and Thailand was equivalent to a year of security budget for the Princess.

Prince Charles decided to stop the funding, explaining that it does not make sense to be spending so much on a person who will eventually not be a working royal.

"Prince Charles decided that as they were not likely to be very senior royals, that this was too much for the public to pay, so he stopped that,” Levin commented during the documentary.

This event allegedly angered Prince Andrew so much that he ended up writing a personal note to the Queen.

Prince Andrew, who is considered the Queen’s favorite son, requested the monarch to intervene with Prince Charles's actions, saying that his two daughters be considered as proper royals.

Unfortunately, the Queen agreed on the matter with Prince Charles and approved the heir apparent relinquishing the security details of Princess Eugenie on her world travels.

Princess Eugenie and her sister Princess Beatrice are currently occupying the 8th and 9th-in-line to the throne, but the pair of royal sisters will be pushed back once nephews Prince George and Prince Louis, as well as Princess Charlotte, decide to have their own kids.

The Princesses ranks will be pushed back even further and this will eventually make them an unimportant branch of the royal firm.