(Realistic au-ish)

You were a maid in the palace of the sea (think the outfit like a Victorian maid dress) and you were sweet but sassy maybe that's what made Poseidon interested in you or something whatever, one day he was having a meeting with his siblings unfortunately as you occasionally served wine pouring it into their cups before standing off to the side.

As they argued, he sighed before you filled his cup with a bit more wine before standing off again and looked around occasionally before the other gods left and it was just you and him, you started cleaning up dirty wine glasses and left the room.