"... maybe I should show you how it's done."
Show him what now? Wait, was Jade going to absorb more of Blake's thoughts? He needed those! He had to get out of his sister's belly before she took any more thoughts from him!
"No, Jade you don't have to do that!" Blake cried frantically as he kicked the belly fat around him, hoping this would get Jade to focus on what he was saying. "Just let me out of here!"
"Oh, I dunno," Jade said as she began to sway her hips, "you've got a lot of knowledge I could use." Despite the playful tone in her voice, Blake feared that his sister was serious. He tried to recall the spell that would set him free from her abdomen, but slamming into the fleshy sacs around him over and over was making it impossible to concentrate. The sound of her stomach's contents sloshing around didn't help either.
Suddenly, the swaying motion stopped and everything was still. Relieved, Blake tried once more to remember the spell. Unfortunately, the words just weren't coming to mind at all. He cursed himself for not double-checking that spell in his spellbook before shrinking and letting Jade eat and absorb him. It wouldn't have taken a minute, it was only five pages after the shrinking spell. Or was it six pages? Four pages? Seven? Come to think of it, what page was the shrinking spell on again? And how did he cast it exactly? Blake began to panic as he realised he was forgetting how his spells worked and where they were were in his spellbook!
Wait, no, he wasn't forgetting. Jade was stealing that knowledge from him!
"Jade!" Blake screamed as his giant sister started walking again. "G-give me back my memories!" However, the only sound he got in response was a gurgle from Jade's belly - a belly he now had no idea how to escape. "Jade!" He began thrashing around in an attempt to get her attention once again.
"So much knowledge in such a teeny tiny brain," Jade sang as she rubbed her belly where she felt her brother's struggles. "Aren't you worried you won't be able to hold on to all of it?" Blake wanted to tell his giant sister how ridiculous she was being, but he couldn't speak due to her hand pressing him deep into her abdomen and swishing him around. Even if he could have a thought without Jade taking it, he couldn't hear it over the groaning and churning noises her stomach were making right behind him.
As Jade continued to enjoy tormenting Blake, a couple of fun ideas occurred to her. First of all, the trapped mage was asking her to give him his thoughts back, but if she could do that, maybe she could plant some other thoughts in his head instead. She enjoyed the feeling of him squirming in her belly. What if he 'mysteriously' started thinking that he belonged in her belly?
Second of all, one of the thoughts Jade had stolen from her brother was the spell he used to shrink himself. She could use that to shrink someone else, eat them, and then absorb their thoughts as well. Or maybe just enjoy their taste and the way they felt in her belly. She licked her lips as she pictured a couple of guys who would be perfect for this, and Blake could hear her stomach rumbling in anticipation of another morsel to digest.
Then again, maybe Jade was being a bit selfish. After all, didn't some of her friends have some tests coming up? They could probably do with the sort of help Blake had given her. Did she have enough time to go home, find her brother's spellbook and get him out of her belly? If so, she could let one of her friends borrow his brain in a similar fashion. If not, she could always shrink one of the smart guys at school and let her friend eat him instead.