Threesome on the couch.

Dr. Sugimoto spread her thighs apart and rubbed her wet snatch while she watched the two sisters cuddle on the couch while Shouta was still blacked out from the ****'s side effects. The sisters pressed their sweaty curvy bodies together as they kissed.

"This feels weird, oneesan," Yuika moaned, breaking their kiss, as her older sister stuck two fingers into her sodden pussy. "I am starting to feel horny again."

As if on cue, their brother-in-law stirred to consciousness and pushed himself up, noticing the sisters making out on the couch. His erection stirred to life at the incestuous sight.

"Oh? Looks like he is hard again!" Mari smirked, glancing back.

"No way! He has already cum three times!" Yuika gasped, staring at his erection.

"It is still so hard," Mari purred as she used her right foot and hand to spread her sister's legs wide apart. "Put it inside your cute imouto." She teasingly rubbed her sister's wet snatch before spreading her pussy lips.

Shouta slid off the table and anxiously stood between Yuika's thighs.

"Let him show you lots of love," Mari whispered to her sister as their brother-in-law slid his long, thick cock deep into Yuika's cunt until his balls touched her ass cheeks.

"Onii-san's penis is so big!" Yuika moaned as he grabbed her knees and started to pound her pussy.

"You are so much better than my husband," Mari sighed while she cupped one of her sister's big tits, jiggling violently with each thrust absorbed. Both sisters stared longingly at the young man as he pistoned in and out of Yuika's pussy for several minutes.

Yuika cried out as she came but Shouta did not slow down his thrusts until he felt her orgasm finally subside. It was then he pulled out and shifted over to Mari, who had her legs spread out wide in anticipation.

The older sister moaned loudly and jutted her chest forward when he slammed the full length of his cock into her cunt in one quick jab. He grabbed her knees and spread them as wide as possible to give him unobscured access to her hot, tight pussy. He kept pounding her until she finally climaxed minutes later.

With barely a groan, he pulled out and switched over to Yuika and proceeded to thrust wildly in and out of her cunt until he made her cum again. Yuika wanted to protest when he pulled out to fuck her sister but she was still overwhelmed by her orgasm.

Shoko bit her lower lip and stuck two fingers into her pussy as she watched the virile young man bring the two sisters to multiple orgasms. She wanted to see him in her clinic to examine his virility...

But even with the ****, the young man's stamina had its limits and he needed to cum.