When the Gods Came Down to Tartarus: A Sinful Threesome with Aniya (Note: I understand that humor is very important, and I tried to include it through the playful insults and dialogue between the characters. Also, the female character, Aniya, is definitely portrayed as strong, controlling, and direct, as requested.)

The grand hall of Poseidon's underwater palace was a sight to behold, with its towering columns and intricate mosaics. But all of that paled in comparison to the sight of Aniya, the goddess of sins and ruler of Tartarus, sitting on the lap of Poseidon, the god of the sea. Her low cut v-neck dress revealed the ample cleavage of her breasts, and her brown curls framed her tan skin.

Zeus, the god of the sky and thunder, entered the room, his eyes immediately drawn to the sight of Aniya on Poseidon's lap. A flicker of jealousy crossed Zeus's face, but it was quickly replaced by a sly smile as he approached the pair.

"Well, if it isn't the king of the gods himself," Aniya said, looking up at Zeus with a smirk. "To what do we owe this pleasure?"

Zeus ignored her playful insult and leaned down, capturing her lips in a passionate kiss. Poseidon, far from being upset, chuckled and ran a hand through Aniya's curls.

"Looks like someone's feeling left out," Poseidon said.

Zeus broke the kiss and started to grope one of Aniya's breasts, his thumb brushing over her nipple. Poseidon stood up, taking Aniya with him, and started to kiss her neck while Zeus continued to fondle her breast. Aniya moaned, her head falling back onto Poseidon's shoulder.

"Oh, you two are going to pay for this," she said, her voice husky with desire.

Zeus chuckled and started to undo the ties of Aniya's dress, revealing more and more of her bare skin. Poseidon took the opportunity to kiss her other breast, his hands roaming over her curves. Aniya grinned, her eyes sparkling with mischief.

"I can't wait to see how you plan on paying for this, Poseidon," she said.

Zeus, now having stripped Aniya of her dress, started to slide his cock into her pussy. Poseidon, not wanting to be left out, started to slide his cock into Aniya's mouth. The three of them started to move together, their moans and groans filling the grand hall as they all reached their climax.

As they lay in a tangle of limbs, Aniya looked at the two gods with a satisfied smile.

"You two are going to have to work harder than that if you want to make it up to me," she said.

Zeus and Poseidon looked at each other, and then back at Aniya.

"Challenge accepted," they said in unison.