Princess Eugenie has broken her silence with her first Instagram post after Kate announced her cancer diagnosis. The Princess of York celebrated her 34th birthday on Saturday, and took to Instagram the next day to share what she is most grateful for. Eugenie posted a rare picture of her youngest son Ernest, who was born in May 2023. She captioned the post saying: “The best gift of all are my boys.. so on this birthday I’m cherishing family and loved ones.” Eugenie’s birthday came the day after Princess Kate, 42, announced to the world that she had been diagnosed with cancer. In a heartbreaking…