Yesterday I heard an interesting story: when Good Father Mangrai was settled into ChiangRai, he met Princess Eua Ming Wiang Chai, of ChiangSaen (Yonok, or whatever it was called then) and wanted to marry her. She insisted on a promise that he would then take no other wife. He gladly agreed.
But when much older, after a successful campaign against the Burmese and tired of fighting them, negotiations for peace included a traditional offering of Princess Pai Koma in marriage; he decided to accept. Queen Eua Ming, distraught, withdrew to a nunnery, in anguish and grief so strong that it infected a great storm. She later later died there at the nunnery. It was gossipped about that the broken promise, and her broken heart, produced the lightening that struck Mangrai down and ended his life.