Traditional legend has it that Niumataiwalu was renowned not only for his valour in battle but also for his beauty. This latter attribute would eventually attract the attention of one of the noble ladies of Bau, causing an illicit affair and leading to his eventual demise, for the lady was Adi Davila of Nairai, the Radini Levuka, wife of the Vunivalu or Paramount Chief of the Kubuna Confederacy. The adulterous affair did not come to light until the Radini Levuka, Adi Davila realized she was pregnant, and though she and her child, Banuve Baleivavalagi, were not harmed, the Vunivalu, Buinivuaka Nailatikau, bided his time and planned revenge for this offence upon himself and his noble household. He tendered the support of two Ono-i-Lau chiefs, Saunikalou and Radua who were visiting Bau at the time and were subjects of Niumataiwalu, by presenting them with a tabua made of black stone and requesting for the murder of their overlord.