Something simple to start with

Sarah shivered at his words, seemingly just as thrilled and excited about the possibilities that coin offered as Tom was. "That's true. Still, do we want to maybe use that in the other direction first? Maybe...make some wishes that will ensure this doesn't ever go too far? Something like...wishing that no matter what I say under the effects of a wish, I'll still love you. Or no matter what I won't really leave you."

"No..." Tom wanted to agree, but he couldn't. "What if, something happens, god forbid, completely unrelated to the coin, and you end up really wanting to leave me? I don't want to wish in a way that would leave you stuck with me if I didn't make you happy."

"That's never going to happen," Sarah tried to tell him, but he could hear in her voice that she was now thinking the same thing. They loved each other in the present, but the future was a story untold.

It was difficult to say, but he explained the other reason he didn't want to try a wish like that. "It also wouldn't...well, with a safety net like either of those in place, I don't know if this would all be as interesting. The danger is part of the fun."

She sighed, but nodded her head in agreement. "Okay then. If that's the case, we're going to have to be very careful with the wishes. They should always have a time limit, not be things you need to actively wish to undo." Tom agreed, so they started considering what to do first. "How about...for this weekend, we do something basic to start with. Wish for me to be tired of having you as a lover, make me uninterested in fucking you, and make me cruel about cheating on you."

Just hearing Sarah say those words send a chill through Tom. They were genuinely scary to hear, but with that fear came so much arousal to overwhelm it. "O-okay..." Together, they worked out the exact wording, and when ready Tom rubbed the coin and read the wish aloud. "I wish that, during the course of this weekend, Sarah will become progressively more uninterested in having sex with me and more sadistic towards me, and will change back to normal afterwards."

Unlike the last wish like this he'd done, as the coin grew hot there was no physical change to accompany it. There wasn't even a change in attitude. Sarah looked at him, clearly thrilled, before leaning in and kissing his cheek. "Well then. Let's see how this goes."