The Mystery Shack was as quiet as a graveyard on a hot summer afternoon. Dipper Pines lay sprawled on the couch, his hands tucked behind his head as he stared blankly at the ceiling. "I'm bored," he groaned, letting out a deep sigh.
Mabel, who was nearby, was engrossed in a fashion magazine. She glanced up at Dipper and rolled her eyes. "Bored? Really?" she teased. "I didn't know you had the capacity for such a complex emotion."
Dipper scowled at his sister. "Shut up, Mabel. I'm serious. There's nothing to do around here."
Mabel, who was not wearing her usual sweater, caught Dipper's attention. He couldn't help but stare at her curves, which were on full display. Mabel noticed his gaze and smirked. "You're just jealous because you can't keep up with my fashion sense," she said, tossing her magazine aside.
Dipper shook his head, trying to focus. "I've got it!" he exclaimed, sitting up. "We can play a game. Close your eyes, Mabel."
Mabel raised an eyebrow but did as she was told. Dipper approached her, his heart pounding in his chest. He leaned in, kissing her neck softly as he massaged her breasts. Mabel's eyes flew open in surprise, but she didn't push him away. Instead, she leaned into his touch, her breath hitching as he slid his hand under her skirt.
Mabel gasped as Dipper touched her through her underwear. She was wet and ready for him, but she wanted to tease him a little first. She got on her knees, taking his length into her mouth. Dipper groaned, his head falling back as she sucked him.
Dipper's mind wandered to Pacifica, who had taught Mabel this skill. He wondered if she was watching them right now, her eyes filled with jealousy. He pushed the thought aside, focusing on the sensation of Mabel's mouth on him.
As he felt himself getting close to climaxing, Dipper pulled away. He laid Mabel down on the couch, spreading her legs wide. He started going down on her, his tongue exploring her folds. Mabel melted in pleasure, her hips bucking as she moaned.
Dipper thought about Pacifica's long lessons as he brought Mabel to orgasm. He thanked her in his mind, even as he entered Mabel and started to thrust. Mabel was used to his size, and she enjoyed the sensation as he filled her up. Dipper finished inside her, his body shuddering with pleasure.
Mabel cleaned Dipper's penis with her mouth, her eyes sparkling with mischief. "Bored now?" she asked, a smug smile on her face.
Dipper shook his head, a grin spreading across his face. "Nope. Not even a little bit."
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