To have Gianna confront the MC, after walking in on steele getting face sat on by huskar anno, plus watching them numerous times through the ships cameras as steele constantly gets face sat on by the other heavy set girls in the Steele harem, also some of the girls on the ship could have a group chat, in it is Pippa, Syri, Anno, Olympia, and Ardia, where they show pics in the group chat of who flattened their slutty captain/boyfriend the best/who's giant fat ass their captain/boyfriend favors more. So this reaches Gianna's ears where she wants in on it too, where this introduces Gianna's face-siting sex scene, to her sex menu, in it where she has a similar mechanic to huskar Anno's face-sitting, where the more time's Gianna face sits her captain, the even more exponentially dommier & possesive she gets toward her MC, as she recognizes the MC as her soft deliciously fuckable cushion.