PERCY WAS TELEPORTED RIGHT IN front of her uncle with a plate of cake in hand that she definitely wasn't holding before (thanks grandma!). 
"You're back!" Adamas was pleasantly surprised. "And you're alive! So, how was it? Was the food good? Is that cake for me?"
She quickly pulled the cake out of reach from his grubby hands. "The cake's mine! I think grandma gave it to me 'cause I missed dessert." 
"How could you miss dessert?!"
"Well..." She winced. "I kinda got sent to the time-out island? But it was all my dad's fault though! I did nothing wrong!" 
His eyes widened a little. "The time-out island?" He let out a whistle. "Shit, I haven't been there in forever. What'd you guys do to get sent there?"
She shrugged. "Dunno. That jerk tried to avoid coming so she had to force him there. And I think she was hoping for us to try and talk things out, but we couldn't even look at each other. She might've been upset about that." 
"And what happened on the island?" He reminded her of gossiping teenagers, always wanting to know every detail of things. 
"Well... nothing bad, surprisingly," she muttered. "He didn't try to kill me—" He even saved her at one point, though she didn't want to talk about that, "—but, uh... at the end, before grandma took us back... he... umm..." 
"He...?" Adamas leaned in eagerly.
"He... offered to give me a tour of the Atlantean Empire? He wasn't demanding, he asked for my permission and everything. It was super weird." 
His jaw dropped. "Wait, what? Percy, tell me everything." 
She blinked, but did as she was told. She recounted everything that had happened on the island, even the part where he prevented her from falling off the top of a mountain. 
When she finished, she expected him to explode. Either with laughter or anger or something. But strangely enough, her usually loud uncle was now silent. He stared at her in pure astonishment.
It took several seconds for him to finally say something. 
"...Oh my gods," he whispered. "He was trying to apologize." 
She cocked her head back. "Huh?" Where did he get that idea?
"Look kid, your dad fuckin' sucks. He's an awful dude. He does terrible shit and he never apologizes for it even when our mom tells him to. I have never ever heard the words 'I'm sorry' leave his crusty ass lips," he told her, which was kind of hypocritical since he wasn't the type to apologize for anything either.
"Um..." 
"But that doesn't mean he's never apologized in his own way though," he continued. "On very very very rare occasions when your dad feels bad for somethin' or when he realizes he's in the wrong (which he always is), he repents in ways that don't include him actually sayin' 'I'm sorry' 'cause he's too damn prideful. That's what the whole 'tour' thing is about. That loser's tryin' to tell you he's sorry and wants to make it up to you by taking you around the kingdoms." 
She stared at him in utter bewilderment. "W-what...? No... No way, that's..." 
Percy couldn't believe what she was hearing. Poseidon... actually felt bad about what had happened? He was trying to apologize to her? 
No. That couldn't be it. Poseidon was heartless. He didn't care about anyone but himself. Why would he feel bad about hurting her? She was nothing to him. Just a disappointment. A daughter he never even wanted.