On the way back to her room (alt)

As Sarah exited the bathroom and entered the corridor she could clearly and loudly hear the jingle of her smartphone. But on the way back to her room she passed the door of her brother's, and that's when a different sound caught her ear. Or, rather, several different sounds that she was all too familiar with, because the walls of their rooms were really badly soundproofed: The sounds of Adam jerking off. His moans, his heavy breaths, his fapping.

Sarah was certain that her brother was still a virgin, as he spent all his time in front of his PC. And that seemed to be the place where he spent his sexual energy as well. As far as she knew he didn't have a girlfriend and had no real experience at all.

Adam's door was cracked open. She decided to sneak a peak.

"Wow. No wonder why he bought the pills! He's tiny!" she thought to herself.

Then Sarah had the most devilish of ideas.

"I know he has had a crush on Amy for the longest time...I wonder how he would react if I called Amy and convinced her to come over to flirt with him a bit, only for me to surprise the both of them and fuck her senseless in front of him."

Only a few minutes ago in the bathroom, she had been afraid to reveal her spectacular transformed body to her own brother. But now all of her earlier doubts and reservation were completely gone. Sarah looked down at her futanari behemoth which was still at full mast and began to leak precum again thanks to her lewd thoughts. Oh, the fun she was going to have with her appendage.

As Sarah contemplated on her course of action, she noticed how the ringing of her phone had stopped.