If the term was appropriate for relationshipp between two criminals you could say that Franco betrayed Hitler. Germany helped Franco to defeat the Republicans and Franco denied Hitler what he wanted most: passage of German troops through Spanish territory to lay siege to Gibraltar from land. He also kept for himself that Canaris was not loyal to Hitler (Canaris secretly advised Franco to stay out of the war since the Allie´s victory was certain). On the other hand, he helped Axis powers in other ways e.g. by allowing export of strategic material (such as wolfram) to Germany. Franco was not a friend of Jews but did little to prevent Jews to escape through Spain or Sephardi Jews in the Balkans getting Spanish passports.
Northern California wildfire doubles in size, displaces thousands (Reuters)
from the article: WWII document reveals: General Franco handed Nazis list of Spanish Jews