Inside her.

"GAH!" Kenji screamed as his cock spewed a thick rope of jizz into her womb. Overcome by wanton lust, he grunted as he kept thrusting to pump a torrent of cum into her hungry cunt.

"Oh!Oh!Oh!Oh!" Shoko moaned, grasping the armrest tightly. She felt another orgasm approach as he continued to pound away at her hapless pussy. She was thoroughly impressed by his virility -- he had already cum twice but managed to stay hard to ejaculate a third time with even more intensity, no less!

Kenji finally stopped thrusting to enjoy the sensation of the young doctor's pussy muscles contracting around his thick shaft. He gripped her ass cheeks and spread them apart so he could watch his cock slowly slide out of her pussy lips as he withdrew, despite the resisting grip of her cunt. His dick slipped out with a slurp and cum oozed from her reddened snatch down her thighs and dripping to the floor.

"I see you can ejaculate in this position, Mr. Kataoka," Shoko panted as she slipped two fingers into her cum drenched pussy.

"Yes, doctor," Kenji smiled at his handiwork. Shoko, her smooth skin glistened with sweat, held on to the chair for support with her knees visibly wobbling from the merciless pounding he gave her.

After catching her breath, Shoko turned over to sit on the chair and let out a gasp. She stared at his huge cock, still hard and erect despite three releases. No patient of hers has had such stamina like his before! She wanted to test his limit.

"Are we done, doctor?" he asked timidly, sensing her eyes on his erection, slick with cum and pussy juices.

"No, Mr. Kataoka," she smiled mischievously. "There are still other positions that I would like to test to see if you can ejaculate in."

"Yes, doctor," Kenji bowed his head slightly as his cock twitched at the thought of fucking the gorgeous doctor again and again.