Lack of intimacy: Henry was reportedly not physically attracted to Catherine, which caused tension between them. He later claimed their marriage had never been consummated.
Infidelity: Catherine had extramarital affairs before marrying Henry and may have continued them during the marriage. Henry became increasingly suspicious and jealous, despite his own infidelities.
Power struggles: Catherine was a strong-willed and outspoken woman who enjoyed exerting influence over the king. This often led to conflict between them, as Henry was used to being in complete control.
Political rivalries: Catherine's family had strong ties to the Catholic faction at court, which put them at odds with the Protestant faction led by Thomas Cromwell, Henry's close advisor. Catherine's involvement in political maneuvers against Cromwell further fueled Henry's distrust.
False accusations: Henry's suspicions about Catherine's infidelity were likely influenced by false accusations made by her enemies, including her previous lovers. These allegations eventually led to her downfall and execution on charges of treason and adultery.
The combination of these factors created an atmosphere of distrust and discord in their marriage, which ultimately led to Catherine's tragic fate.