Go deal with Aquarius.

He decided to go to Aquarius, who was still sitting in the tub, looking annoyed. "So then, I'm going to have Lucy send you back, but first, I have a standing order for you'" he told her.

"Yeah yeah," she grumbled. "Out with it, so we can get this over with."

"No telling anyone, including the other Spirits, about what transpired, in any way," Natsu told her. "This includes everything from outright saying it, to hinting at it, writing it, any kind of body language, or even acting shifty to draw attention to it. Just act as normal, like nothing happened, and give a believable excuse as to your extended absence," Natsu ordered.

Seeing no loophole, she shrugged. "Fine, fair enough... Anything else you wanted?" she then snarked.

"Not at the moment," Natsu said. "Lucy, come in here!" Lucy walked in, and at a signal from Natsu, dismissed Aquarius.

"Okay, that's one thing taken care of..." Natsu smirked.