[Author's note: This branch is way too good for me to allow to quietly die.]
"You poor thing," Jon said to the reflection in the mirror. At least he'll remember that his new body is sexy. Whether his future mind would believe the judgement of 'a foolish boy she used to be' was another matter altogether.
"Mmmph~." Another one of those sensual little sounds escaped him as he thought it over. It wasn't quite an all-out moan, per se, it was more like... A whimper? Yeah, that was it: A needy, horny whimper for attention from anyone around Sue whenever she got wet, where right now, she was only just a little damp. Jon hadn't even had to touch himself again, or anything: he just happened to be in the mood right then, and so, out came the incoherent cry for "help".
Hehehe. Now that's an embarrassing thought! Jon realized with a whine, the masochistic side of him tingling his pussy for thinking it. Thanks to that vocalization wish earlier, whenever Sue was feeling horny, even just a little bit, everyone would know it, like it or not: there'd just be no stopping the little whimpers or the whining, or the low rumbling purrs or the adorable little squeals and squeaks she'd be forced to make, let alone the full-on, unmistakable moans at any little caress of relief. Jon pictured her when she was feeling really, really hot and bothered: Not just loud, but flustered, red and sweaty and fidgety and humiliated, gasping for breath between all her involuntary pleas for release. That image was enough to get Jon himself all hot and bothered, and it manifested as dampness and a squeal, and worse than that as another one of his dangerously frisky ideas.
What if, Jon thought, I kept her on that edge, for as long as I reasonably could? Desperate, needy, helpless, and if she's in any space that isn't absolutely private, humiliating as well? The moment the idea fully formed in Jon's brain, he wondered why he hadn't thought of it sooner: to someone as sexually self-punitive as he was, this sort of thing was bread-and-butter gold! Hurriedly, he grabbed the stone.
"I wish that S-... Ngh!" He couldn't make it through the sentence. Jon was too worked up, and Sue couldn't shut up about it. Jon thought about putting a stop to that with a wish, but then figured that right then, no, he didn't trust himself to make that wish itself without being interrupted, so he set the stone aside. There was only one sure way out of this at the moment, and that way went over the hill. Which is the point, Jon thought as a little hand snaked under the elastic of his leggings. Better enjoy it while it lasts!
And just like that, the pleasure started pouring in through his hand, and out from her mouth. "Aaah~... Hah~... Aaaahmn~!" For a few short seconds that seemed much much longer than they actually were, she was writhing, moaning lustily as the orgasmic pressure built, and built, and built, and eventually, finally hit a breaking point. "OH, GOD, FUCKING, AHHH HELP ME!" She screamed as nirvana finally ripped through her and soaked her hand, prompting her to collapse down onto her huge ass and just breathe.
Panting in the afterglow, Jon reached for the stone. The experience was incredible, but with clarity of mind, it was obvious what a nuisance it was to have to go through at all. Time for a utility wish: "I wish that I couldn't be interrupted from making a wish by any sexual vocalizations I might make." The stone glowed; wish granted! Now for the real fantasy wishing: "I wish," Jon began, "that Sue would be morally opposed to masturbation, to the point that she'll never voluntarily get herself off that way. I wish that nevertheless, she very frequently caves into the temptation to tease herself or to entertain lewd thoughts when she's horny, which just works her up even more. Hence, her only recourse is to whimper and wait for David or someone to come and take of her when she gets that way." Jon paused a moment. Rationally, perhaps, he ought to have stopped there, and spared himself some pain. Naturally, he did no such thing. "I wish that my libido's high enough that this happens somewhat frequently, even when it's inconvenient for both Sue and her husband."
And, that was that. No more self care. Now her new self was privy to random episodes that might spiral out of control, turning her into a hot, horny, whimpering mess until David finally did her the mercy of getting her off. Lucky guy, Jon thought. At least he was getting a good deal out of Jon's bad habits: Now, no matter how much Sue might complain about the size difference, or his attention to her breasts, or his groping of her ass, it was very painfully clear that she needed him, in a bad way, when (not "if") the mood ever took her. She was absolutely, helplessly at David's mercy, and that thought, of course, tingled Jon's newly heightened libido enough for him to whimper.