“If I do it, you have to get all the way topless,” he said, staring at her fine looking tits. She wasn’t top-heavy, but she definitely had a handful and the more he thought about it, the more he really wanted to see them. “And you have to let me touch them.”
“No way!” she cried out, laughing at him. “But I really will show them to you.”
“For how long.”
“For as long as you stay naked, too.”
He liked that idea. He could stay naked for a very long time. “All the way topless, right?” he checked. Still smiling, she nodded and he couldn’t find a reason to refuse. “I need to get some Kleenex.” He moved to the counter and snatched several tissues from the box. A small part of him didn’t believe he was really going to do this. The hard, throbbing part of him knew that he would.
His sister stared with an eager look in her eyes, but she didn’t say anything. Instead, her lips became a tight slit, as if she was holding back a comment, but didn’t want to jinx things.
“I can’t believe I’m doing this,” he mumbled, looking at the TV for some inspiration. On-screen, the cute couple in the bathroom were fucking and that helped. He liked the blonde girl’s smile and how into it she looked. Holding the Kleenex in his left hand, he started stroking his cock with his other hand.
He glanced at his sister and saw that her eyes were locked on his cock and hand. It felt so funny and strange to have her witnessing this, but he was too far into it to really care. He felt that aching need turning into the beginnings of a true release as his cock began throbbing and his balls went even tighter. Pumping furiously on his cock, he carefully caught his orgasm in the wadded-up Kleenex, filling the thin tissues with his creamy white spunk. Every throb and squirt felt wonderful until he felt like he had drained his balls.
He shivered and looked at his sister for her reaction. She had an interesting expression on her face, one that looked caught between hunger and surprise that he had really done it. The hungry part confused him.
“That was hot,” she moaned.
“Do it,” he gasped, still breathless from the thrill of his release. “Show me your tits.” He wanted her to do it before he lost his thrill.
Robin hesitated just long enough that he thought she was going to renege on their deal. Then her eyes moved back to his cock and she decided to do it after all. “You better not tell anyone about this,” she said in a threatening tone right before reaching for the hem of her shirt. After pulling it over her head, she fished behind her back, popped her bra, and just like that, she was completely topless.
“You’re right, this feels funny,” she said, blushing while struggling to stop her hands from covering her breasts from him.
“Try being completely naked,” he said, staring directly at his sister’s tits. Seeing her topless felt strange for him, too, but he still liked it. She had great looking tits. Her pointy nipples looked hard. He especially liked how her tits rested against her chest. “You have nice ones,” he mumbled. Complimenting her felt very stranger than being naked in front of her.
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