Shin had purposely made a show of jerking off, so his sister could see. And even after she entered the room, he didn't hide his huge cock.
On the contrary, he made sure she would have a perfect view of it. And even if Yumemi wanted to avoid it, her eyes kept darting down to glance at that monster.
"Disgusting brother!" she hissed, trying to bury her own lust beneath performative rage. "Were you masturbating to a picture of me? Put your disgusting cock back in your pants. It stinks, and I don't want to look at it."
She needed to keep a strong front; if she acted too submissive from the start, he would walk all over her. Yumemi was sure her brother was just a horny loser, probably so desperate for her that he couldn't control himself.
Honestly, seeing him like this gave her a twisted confidence boost. It was proof of a power she held, the power to make men burn with want for her body.
She was used to manipulating men with her body, making them her servants.
