Mabel Pines sighed dramatically as she flopped down onto the couch in the Mystery Shack. "I'm so bored, Dipper," she complained, flicking her long hair over her shoulder. "There's nothing to do around here."
Dipper, who was sitting at the desk across the room, looked up from his notebook and glanced over at his sister. He felt a sudden jolt of surprise as he realized that Mabel wasn't wearing her usual oversized sweater. Instead, she was wearing a thin shirt that clung to her curves, revealing a hint of cleavage and a short skirt that showed off her legs.
Dipper felt his heart start to race as he took in the sight of his sister. He had never really noticed how attractive she was before, but now he couldn't seem to tear his eyes away.
Mabel noticed her brother's gaze and grinned. "Like what you see, Dipper?" she teased.
Dipper blushed and quickly looked away. "Uh, yeah, I mean, no," he stammered. "I was just...thinking."
Mabel raised an eyebrow. "Thinking about what?"
Dipper hesitated for a moment, then stood up and walked over to where Mabel was sitting. "I have an idea," he said, his voice low and husky. "But you have to close your eyes first."
Mabel's eyes widened with excitement. "Ooh, a surprise! I love surprises!" she exclaimed, closing her eyes obediently.
Dipper took a deep breath, then leaned down and gently kissed Mabel on the lips. She gasped in surprise, but didn't pull away. Instead, she kissed him back, her lips soft and warm against his.
Dipper's hands started to wander, sliding up Mabel's skirt and touching her through her underwear. Mabel moaned softly, her body responding to his touch.
Without hesitation, Mabel got on her knees and started to unbutton Dipper's pants. She pulled down his boxers, revealing his hard cock.
Dipper's eyes widened as Mabel took him in her mouth, her lips wrapping around his shaft. She had learned how to give a good blowjob from Pacifica's dildo, and she was eager to put her new skills to the test.
Dipper groaned in pleasure as Mabel sucked him, her tongue swirling around the tip of his cock. He reached down and started to play with her breasts, his fingers pinching and twisting her nipples.
Mabel moaned around his cock, her body trembling with pleasure. She could feel herself getting close to cumming, and she wanted Dipper inside her when she did.
Dipper pulled away from Mabel's mouth, his cock glistening with her saliva. He laid Mabel down on the couch and spread her legs apart.
Mabel watched as Dipper pulled down her shorts and underwear, revealing her wet pussy. He started to finger her, his fingers sliding in and out of her tight hole.
Mabel moaned, her hips bucking against Dipper's hand. She was so close to cumming, and she could feel herself getting ready to explode.
Suddenly, Dipper stopped fingering her and pulled his hand away. Mabel looked at him in confusion, but before she could say anything, Dipper leaned down and started to eat her out.
Mabel moaned in pleasure, her body trembling as Dipper's tongue lapped at her clit. She could feel herself getting closer and closer to cumming, and she knew it was going to be intense.
Finally, she couldn't hold back any longer. Mabel cried out as she came, her body shaking with the force of her orgasm.
Dipper slid his cock inside her, grateful for Pacifica's patience. He started to thrust in and out of her, his hips moving in time with hers.
Mabel wrapped her legs around Dipper's waist, pulling him deeper inside her. She moaned in pleasure, her body still trembling from her orgasm.
Dipper groaned as he felt himself getting close to cumming. He wanted to make this last as long as possible, but he couldn't hold back any longer.
With a final thrust, Dipper came, his hot seed filling Mabel's pussy.
Mabel moaned in pleasure, her body still trembling from the aftershocks of her orgasm. She smiled up at Dipper, her eyes shining with happiness.
Dipper smiled back, his heart still racing from the intensity of their encounter. He couldn't believe what had just happened, but he knew one thing for sure - he couldn't wait to do it again.
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