Arya can't help but watch in pride as Gendry holds court. He is calm and cool, even when an arrogant lord makes a passing jape about his bastard heritage. It makes Arya dig her nails into her throne, but beside her Gendry does not react. He never reacts
Just stares down the lord who pales under her lord husband's gaze and stammers onto talks of business.
Arya thinks that the lords of the Stormlands are starting to understand what she figured a long time ago.
Kings are not born, but forged.