Write a question about the following article: Atahualpa's wife, 10-year-old Cuxirimay Ocllo, was with the army and stayed with him while he was imprisoned. Following his execution she was taken to Cuzco and took the name Dona Angelina. By 1538 she was Pizarro's mistress, bearing him two sons, Juan and Francisco. Following his assassination in 1541 she married the interpreter Juan de Betanzos who later wrote Narratives of the Incas, part one covering Inca history up to the arrival of the Spanish and part two covering the conquest to 1557, mainly from the Inca viewpoint and including mentions of interviews with Inca guards who were near Atahualpa's litter when he was captured. Only the first 18 unpublished chapters of part one were known until the complete manuscript was found and published in 1987. Francisco Xerez wrote an account of the Battle of Cajamarca.

Question about the article:
How did the father of Juan and Francisco die?