On her.

"On... On me," Yuika panted as her pussy spasmed around the dildo. "I begged him to pull to out!"

"Interesting," Shoko noted. She pulled out of the schoolgirl's drenched snatch and removed the strap-on from her waist.

"He pulled out before he could cum," Yuika said, taking her legs off of the chair's armrests and closed her thighs out of modesty. "I knelt down in front of him and he masturbated until he came on my face and tongue. But he continued to cum and covered my breasts with his hot cum!

"I told him, 'Onii-chan, I knew I could trust you.' Then I sucked his cock clean."

"Are you on birth control?" the doctor asked her.

Yuika shook her head and glanced at her older sister. "I... we... I mean, the boys who I have sex with wore condoms."

"I will prescribe you Levonorgestrel as an emergency contraception," Shoko suggested. "Take it as soon as possible to avoid the possibility of getting pregnant."

"Pregnant?" Yuika gasped. "But onii-chan pulled out in time!"

"Even though he pulled out there's still about a twenty percent chance of conception. Pre-ejaculate still contains sperm."

"I will also write a prescription for birth control if you decide to continue to have unprotected sex."

"Yes, doctor," Yuika nodded.

"Thank you, Dr. Sugimoto, for helping my sister," Mari nodded her head slightly.

"Is there anything else I can help you with?" the doctor asked.

Mari looked down at her hands on her lap.