At the suggestion of a relative, young Sangwan was sent to live with Chan Saeng-xuto, another relative and a nanny to Princess Valaya Alongkorn, the Princess of Petchaburi, daughter of King Chulalongkorn (Rama V) and Queen Savang Vadhana (later Queen Sri Savarindira, The Queen Grandmother). At the age of seven, Sangwan found herself at the royal court. Her only duty at that time was to present herself at a twice-daily audience with the princess—when she woke up, and again in the evening. Every now and then, she would join the princess's entourage when she went for an audience with her mother, Queen Savang Vadhana, at Suan Hongsa Royal Villa on the grounds of Dusit Palace.