Who is Irene Mengele from Children of the Flames: Dr. Josef Mengele and the Untold Story of the Twins of Auschwitz and what is their importance?

Irene was Josef Mengele's first wife. She enjoyed culture, adored her husband, and even visited him at Auschwitz. After the war, however, she quickly became disillusioned by the fact that she had to pretend her husband was dead and asked for a divorce. When Mengele moved to Argentina, Irene refused to go with him. She'd met another man during Mengele's exile in Argentina and again requested a divorce. This time he obliged.