They sleep together.

"Alright Lucy, let's head to bed," Natsu grinned, neither of them bothering to get dressed, though he still picked up the Note.

"This early? I like, thought your fight with Erza wasn't until the afternoon?" Lucy blinked.

"True, but I'd like to be well rested, maybe get a warm up in first... Or have time to fuck you, then Aquarius in the morning if she gives in... Speaking of which..."

He opened the Note, and wrote, "For the remainder of this time Lucy Heartfilia has Aquarius Summoned, it will cost her no magic to keep her here, so Aquarius will continue to endure her punishment in the tub."

"There, that should keep Aquarius from getting away," he smiled, palming Lucy's ass. "And don't worry... I'll keep you as a bimbo until we leave for the fight," he assured her.

"Oh," she moaned, feeling his hand on her ass. "Like, yay! I love being a bimbo, almost as I totes love being a ****, not that the normal me will like, fess up to it," she grinned, pressing her butt into his hand.

He chuckled as they got in bed together, and soon fell asleep.