“Why didn’t you just hook up with some guy?”
“Are you for real?”
“I’m just saying, if I was a chick, I would never need to jerk off.”
“Because you’d just find some guy who wanted to fuck you, right?” she asked. He nodded and she shook her head. “Just because a guy wants to fuck me doesn’t mean that I want to fuck him, you know?”
That didn’t make sense to him, but it felt cool talking to her about sex. “Have you done it a lot?”
She shrugged. “I’m not a slut, if that’s what you mean.”
“But you like doing it, right?”
“With the right guy, I do.”
Her willingness to talk about all this fascinated him. Was it because he was naked and hard? “I love doing it.”
She smiled and he felt foolish. Of course, he would love to do it. What guy didn’t love to do it? “How often do you do it?”
“Whenever Suzanne lets me.”
On the TV, the trio had moved from the rope swing to the porch of a house where the guy took turns fucking each of the women. Robin barely noticed. She seemed much more interested in staring at her naked brother and his hard cock. “Does she like to do it?”
“Sometimes,” he said. It felt funny talking about his girlfriend to his sister.
“Do you ever go down on her?”
“Fuck, I love doing that!” His cock throbbed hard, showing that he was telling the truth. He tried covering it up again, but Robin wasn’t having it. Shaking her head, she waved her hand and he uncovered himself.
“More than fucking?”
He laughed. “I don’t know about that! Fucking is fun!”
“I want to watch you jerk off,” she suddenly blurted out.
“I’m not doing that!”
“Why not?” she asked with a playful smile on her face. “You’re already naked and hard. Go for it.”
“What’s in it for me?”
“I won’t tell Mom and Dad.”
“You already promised you wouldn’t,” he insisted.
Glancing at the TV, he saw the scene that had been playing had ended and a new couple were getting into it. They were in a bathroom. She snuck in, pulled his towel off his waist, and started teasing him. His favorite part of this scene was when some other chick peeked in through the open bathroom door and watched them for a moment.
He stared at the TV for a brief moment. He had met the conditions of their arrangement. He glanced at the hallway, the safety of his bedroom, and his clothes, but he didn’t feel like going that way.
“Come on, just do it,” Robin pleaded.
“Are you going to do it, too?” he asked.
For a moment, Robin seemed to actually think about it! But that moment only lasted a moment. “You know you want to do it.”
“And you want to see me do it,” he said, flipping it back around on her. “Show me your tits and I will.”
“Do it and I’ll show you my tits,” she countered.
He pondered her offer. Robin could be mean, but she was always honest with him. He liked the idea of seeing her tits. His sister looked like she might have nice tits, too. Besides, if she would show him her tits, what else might she show him? He really needed to get off, too. He had been hard long enough that his cock ached for release. Through the sex-addled fog in his brain, he tried to find a compromise that would work in his favor.
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