He wasn't sure anymore what she was trying to get out of him. A rise or for him to leave. If she thought he was going to leave her alone, she was mistaken. Clearly she'd bet on the wrong Olympian if she expected things to be any different.
He however had to learn how to deal with this Amphitrite and maybe in time they'd finally see each other on a level playing field. Right now things were still rocky and they were aiming at each other below the belt.
She dismissed him so carelessly that the water growled back at her. She was going to regret that.