The romantic Karin revealed herself also as a woman with great willpower. In 1945 she was overwhelmed with marital problems, obligations as a mother of six, and financial difficulties. She and Manuel separated. With the help of the children and their father, she established her own cattle ranch. In 1952 she moved into the first “Pampa Mia” near Progreso.
During World War II, Cobos worked on Base Baltra. Soon after the birth of her sixth child, Karin Guldberg left Cobos and in 1952 moved into her cattle ranch "Pampa Mia." Eventually the ranch was relocated at 500 m, at the time the highest settlement on the island.