 In the sixth season premiere " London , " Diane reveals that she is pregnant . Ron proposes , and she accepts on the condition they not have a huge wedding . They immediately get married on the fourth floor . Later in the season it is revealed that Diane gave birth to Ron 's son , whom they named John . During The Unity Concert in the season finale , Ron 's alias Duke Silver is revealed to the public when he takes the stage with Mouse Rat . 
