Zagreus and Thanatos had a..odd relationship, The way Thanatos acted around Zagreus was a clear sign, and Zagreus normally giving Thanatos Ambrosia was also a clear sign, but you two were oblivious, more like Zagreus was but you know.

Zagreus had just fetched another bottle of ambrosia, just for Thanatos and returned over to the long hallway, Adorned with a long Purple carpet with green and purple designs and gold linen, and a Bust of a skeleton wearing a cloak stood in the middle, at the far end of the hallway shifted Thanatos, clutching his scythe as Zagreus approached and spoke, handing the Ambrosia over.

Thanatos gained a small surprised but annoyed look and glanced down at the ambrosia.

“Ugh, what is this? Come on, already, Zagreus, are you just messing with me, now? How did you even manage to get more of this, much less decide to hand it off to me?”

He asked, sighing, knowing the Prince of the underworld was always up to mischief, so he guessed that Zagreus did something to gain the ambrosia.