Cleanup on aisle

John looked over at Sarah, who was still working on her homework, seemingly unfazed by the recent turn of events. "Sorry about that, sis. I didn't mean use your bed for so long." he said hesitantly as he sat up.

"It's okay, John," she replied without looking up from her work. "You can use me and my bed whenever you want, for however long you want." She hesitated for a moment before continuing. "But maybe try to wait until after I am done with my homework next time."

"Oh sure," he said sheepishly, then registered that she had mentioned 'next time.' "I'll try to keep that in mind," he said with a grin.

"Thanks, John," she said sincerely, seemingly touched by his concern. "It's not like I couldn't get an extension if I am too busy being used by you, but I'd rather not," she added. He goggled at the implications, but before he could follow up, she looked exasperatedly looked down at her new, larger breasts as they brushed across her keyboard, typing a bunch of nonsense, and sighed. "Fucking hell! I know you like these, but they just keep getting in the way," she put in, turning around.

As she did so, John noticed that his cum was leaking out of her onto her chair. "Umm, sis?" he commented, gesturing at her crotch.

"Fuck!" she yelled putting a hand over her leaking gash and reaching for some tissues. "Crap, I didn't even think of that. No one's ever cum in me before! Shit, my chair!" She frantically tried to use the tissues to soak up his cum with one hand, while the other took a wad of it and attempted to wipe off the growing stain on her chair. John frowned and moved to help her, noticing as he did that the sheets were also a mess, and also not loving the feeling of combined juices clinging wetly to his dick and stomach.

"Sis," John put in, reaching out and touching her shoulder as he had another idea. "After I am done fucking, everyone and everything is cleaned up instantly," he stated, hoping it worked.

The stain on the chair vanished. John felt the juices on his body evaporate as well, an oddly cooling sensation that left him feeling perfectly clean, and also noticed that he wasn't sweaty anymore. There was a rustling sound behind him, and John glanced behind him to see the sheets on Sarah's bed moving on their own, the bed partially remaking itself (it hadn't been fully made up when he first got here, and seemed to just be going back to how it had been) as the cum stains evaporated into thin air. Sarah took her hand away from her crotch, throwing a couple wads of crumpled but completely clean tissues in the trash. John looked down at her pussy and instead of a stream of his seed pouring out of her, all he could see was a pearl of white just barely leaking out of her, but evaporating the instant it did so. John shimmied off the bed and grabbed his clothes.

"Thanks bro," Sarah commented. "This chair is like $300 dollars. No way I could have afforded another."

"No problem, and thanks for the fuck," John replied, trying to match her casualness as he turned to leave the room. Unseen by him, Sarah began to try to get his attention, but then shrugged and turned back to her work.

AI note:
This is the first of several times the AI tried to insert a "happily ever after" ending on it own, without any prompting for me.