Flynn snuck into CeCe's room while he thought she was not home. He went for her laundry. He was going for a pair of used panties. He dug around for a bit before he grabbed a pair of them. And then he set himself a course back to his room. He was going to use CeCe's panties to jerk himself off.
But while he was sniffing her panties on the way out of her room CeCe walked in. He tried to hide the panties behind his back.
"Flynn! What are you doing in my room!?" CeCe yelled at him.
"Nothing?" Flynn replied sounding very not confident in that answer at all.
"Do you have my panties in your hands?" CeCe asked. She could see them. He did have them in his hands behind is back. It was fairly obvious.
"No." Flynn said. Still not sounding very confident.
"What do you have then?" CeCe asked.
"Nothing!" Flynn said again. Flynn stood his ground. But it was rather shaky ground and he was the one making it shake.
"Ugh." CeCe said. She wasn't going to get an answer out of him this way. She grabbed him and turned him around. And as she suspected. He did have a pair of her panties in his hands. She grabbed it off of him and turned him back around. "You do have my panties!" CeCe said.
"Oh how did those get there?" Flynn said. "Must have got stuck to my hand." Flynn lied terribly.
"You were going to jerk off with these weren't you?!" CeCe asked.
"No." Flynn said.
"Yes you were!" CeCe said. "Or else why would you be in my room! And why would you have this boner!" CeCe said. She pulled down Flynn's pants in one go and as suspected his hard erected cock flopped out of his pants.
"CeCe what the fuck?" Flynn said when his cock was exposed.
"Look at that! You're hard! You were going to use my panties to jerk off!" CeCe said.
Flynn tried to say no again.
"Get on my bed!" CeCe said. Flynn hesitated. "Now!" CeCe yelled. Flynn obeyed. He got on her bed.
"Okay Okay!" Flynn said.
CeCe stood over Flynn. Flynn wonder what would happen next. CeCe still had the panties she had taken out of Flynn's hands in her hands.
Flynn was surprised at the next move. CeCe started to jerk off his hard cock with her panties
"What? You look surprised! This is what you were going to do anyways. Wouldn't you much rather have your sister jerk you off too?" CeCe said teasingly to Flynn. Flynn had thought many times about CeCe. That's why he was jerking off with her panties. But he never thought it would actually happen. He never thought that CeCe would actually be jerking his cock with her panties wrapped around his cock ever.
Flynn watched CeCe jerk his cock off. He felt every movement of her panties and her hand around his cock. It felt a damn lot better than his own hand. It was amazing to have his sister jerking off his cock right now. He felt like he could explode at any minute.
His cock did explode cum out the tip. And a lot of it. All over CeCe's hands and CeCe's panties that she was jerking him off with. There was a lot. More than even Flynn expected to blow. But that was as a result of the hotness he felt because of his sister jerking him off.
"Wow. What a big load for a little boy!" CeCe teased him. CeCe removed her cummy panties from around Flynn's dick. "Now get out of my room!" CeCe said. Flynn quickly got out of CeCe's room and went to his own.
Their mother came home very soon after that.
CeCe called her mother into her own room.
"Mom! Flynn was in my room and he jerked off all over my panties!"
Flynn was grounded for a very long time, but CeCe would make it up to him in the very very near future. And in the slightly further future Flynn would be ungrounded for reasons.