attack on the castle, Mary's love for Francis began to fade, as she blamed Francis for her rape by keeping her in the dark for so long about all that was really going on with Narcisse's blackmail, and as a result left her vulnerable to the attack. She decided they should live separate lives and moved back into her old chamber away from Francis. Despite both trying to mend things on separate occasions, their relationship only got worse. Finally, Mary realized things were pretty much dead between her and Francis when they failed to have sex for the last time. Mary decided to return to Scotland to rule there in person from now on and asks Condé to come with her, where they can be together and starta new life for both of them. With Lola's advice, Francis allowed Mary to be with Condé, hoping that she would change her mind to come back to him. Some time later, when Catherine learned of Mary's affair with Condé and planning to run away to Scotland together; she quickly told Francis of Mary's betrayal and he suddenly collapsed.

Mary and Francis were first engaged to each other when they were only six years old. When Mary first entered the French Court as a child they were playmates. In the Pilot, there are flashbacks where they are seen playing on the stairs and in Mary's chambers.