However, Catherine who had been previously assured of Claude's innocence in the matter by Bash became suspicious and, after putting the pieces together for herself, went into a furious rage, confronted and murdered Diane by strangulation to avenge her daughters.
Queen Catherine learns of Queen Mary's actions and has all the Scots who know of the contract killed.
Desperate to cover this up, Mary orders Hortenza killed and a forged letter incriminating her.