She might be known for being the woman that eventually came between Prince Charles and Princess Diana and has been blamed for the end of their marriage. However, that may not have been Camilla Parker Bowles’ first tangle with the royal family.

According to the “Royals” podcast, as it turns out, the future Duchess of Cornwall’s first husband, Andrew Parker Bowles was also involved in an affair with a member of the royal family—Prince Charles’ sister, Anne, Princess Royal.

“It was well-known that Andrew Parker Bowles had multiple lovers. When Charles and Camilla reignited their relationship some years into his marriage with Diana, he was forever known as the man who laid his wife down for the country, commentator Angela Mollard said. “This is really funny. Princess Anne, who we always think is the grumpy one with the bun—she had an affair with Andrew Parker Bowles.”

“There was a royal triangle going on,” she added. “the fact is, they had an affair and they’ve remained friends. They’re both obsessed with horses and when they get together at Royal Ascot they get on really well.”

The affair was first disclosed in the 2007 book “The Diana Chronicles,” and it was revealed that Parker Bowles adored women.

“One of his earlier diversions was a torrid affair with Princess Anne, who, in her stern way, has always enjoyed a roll in the hay,” Tina Brown wrote in the biography. “There was a romantic re-enactment of ‘La Ronde’ on the dance floor at Annabel’s one night in 1971 when it was clear that Princess Anne was in love with Andrew Parker Bowles, Camilla was in love with him too, and Charles was in love with Camilla.”

Of course, the affair eventually came to an end, as he went on to marry Camilla in 1973 after her initial relationship with Prince Charles also ended. They stayed married until their divorce in 1995. Princess Anne went on to also marry Mark Phillips in 1973, with whom she had two children, Peter Phillips and Zara Tindall. They divorced in 1992, and she shortly remarried to Timothy Laurence.