Shireen Baratheon, Lady of Storm's End and Princess of Dragonstone

Jon had not left the Great Council before Shireen was on him. Against the wall of the Red Keep he took her for the first time, remembering the mousy but kind and intelligent young woman he had first met years ago. It had been her first time, and she had told him that she loved him, and that while she could not be wed him (as he was already married), he would father all her children.

She had been wrong about one of those things. Jon was a Hero after all, and Heroes can bend the rules a little more than most.