Have them and Lucy double team him!

"So, how do you want to play this?" Lucy asked Natsu with hooded eyes. "Have Gemini copy you and double team me, or copy me and double team you?"

"The latter this time," he nodded enthusiastically. Lucy nodded, and the two sprites did their thing, changing into a carbon copy of Lucy, naked.

"Mmm, really love this sexy form," Gemini crooned, giving a twirl. Now a single female entity for the moment, she gave Natsu a saucy wink. "How many we serve you, Master?" she asked, feeling extremely eager to please, due to feeling Lucy's own submission to Natsu.

"Double boob job?" Lucy suggested. When Natsu nodded, she and Gemini pushed him down gently and proceeded to envelop his cock, sandwiching it between their large, soft boobs. "You like this, Master?" Lucy crooned, as she and Gemini pushed their chests against each other harder.

"Yeah," he panted, leaning back on his hands, and tilting his head back, simply savoring the sensations. "Keep it up..." he stated, his hips bucking a bit.

Gemini giggled a bit, before tilting her face forward, and licking his tip as she and Lucy moved their assets against each other, side to side, up and down. "That's it, give our Master more pleasure," Lucy moaned as she kept going, and Gemini nodded, letting Lucy take a turn licking his cock head.

They squeezed their tits tighter together with their wrists as they kept going, gazing at Natsu with their chocolate brown eyes in an adding manner as he met their gazes. Before long, his cock began to throb, and he squirmed in pleasure. "I'm almost there!" he gasped, and they simply upped the intensity of their movements in response.

He groaned, and his member shot his seed up at Lucy and Gemini's faces and tits, making Lucy giggle gleefully. "Mmm, yes, paint your blonde little bimbo genie slut," she crooned as she licked at every bit of seed coating her face, Gemini following suit without an ounce of shame.

Natsu panted, and sat up straighter. "That felt great, girls," he chuckled. "Well, kind of a girl in Gemini's case..." They looked up at him in adulation at his words.