Quite sexily.

"Okay, Megumin, go start eating Aqua out," Kazuma ordered her.

"As you command Master, nyah!" she cooed crawling towards Aqua. As she did, Kazuma sat behind Aqua, and pulled her to sit on his lap.

"Master, what are you doiIIIINNNG!?" Aqua yelped as he guided his cock to pressed against, and then into her rear end. "M-Master, that's my, ahn!" she was cut off by Megumin reaching her, and leaning in to start licking at her pussy. Aqua closed her eyes and squirmed in Kazuma's lap as both of her lower holes were stimulated.

Kazuma grinned as he reached up from behind, and began to grope Aqua's boobs, eliciting more moans from her. Darkness smiled softly as she walked up, and knelt in front of Aqua, cupping her chin and pulled her face towards hers, capturing her lips in another kiss. With her free hand, she started to stroke Megumin's back, making her shudder and purr as she kept licking at Aqua's snatch with her rough tongue.

"That's it, good sluts," Kazuma chortled as he pinched and pulled at Aqua's nipples.

"Mmmph!" Aqua moaned into the kiss she was sharing with Darkness, feeling her ass squeeze his dick all the while. With how tight a fit it was, she felt his cock thrumming almost as soon as Kazuma did.

"Here it comes!" he shouted, and Aqua's eyes shot open and rolled up as she spasmed in orgasm while his seed filled her rectum. She wheezed as Megumin pulled away from her cunt, and Darkness broke the kiss. Kazuma smirked as he pulled his dick out of her rear. "Good girls," he told them.