Mabel found herself drawn to the cave in the night. She tried to take Bill out of the cave, pushing him, pulling him, but there was a magical barrier, trapping him here in this cavern. She frowned. "There's gotta be a way to get you out of here..." she muttered.
"I don't think so, Star. Unless..." He shook his head. "No, no, never mind."
"What?" asked Mabel, curious. "Tell me, please!"
Bill was silent. "...You should go home, Star, it's getting late, and you need your sleep. Don't forget about your tests tomorrow."
She sighed. "Okay. But you have to promise you'll tell me."
"I can't."
"Why not?"
"Because... Only Pine can do it." Bill said. "And I don't think he'd want to, anyway."
Mabel got up. "Well... Until then, I'll bring down some stuff to make this place cozy and comfortable for you!" She grinned at him, blissfully unaware of how hard that would be, starting tomorrow.
After the kids came home from school, Stan was there waiting, with steely eyes and crossed arms.
"Kids, I'm putting you to work." said Stan, looking down at them both. "You two need to learn to have responsibilities. So, Mabel, you have dishwasher duty, and Dipper, you have to do the laundry, every day."
The younger twins groaned in protest. "But-" they both started simultaneously.
"No buts! Get to work. And I don't want to hear any complaining."
They sighed, sadly, and went to their tasks. Mabel would have preferred Dipper's job, as Dipper would have liked hers, but they both had little choice in the matter. So they went on with their new chores, trying to figure out how to do them.