"So... if I am owned by you you can make arbitrary changes to my mind, which is terrifying. But apparently people can already make arbitrary changes to my mind. --Is this a known thing that happens? My previous self did not exactly keep up on current events."

"Nah, I didn't even know magic was real until like three days ago. Now I know there's me, the mysterious stranger who gave me my powers, and whoever fucked you up like that. And—I guess you've got no reason to believe me about this, but—if I make you mine for this, I'm not gonna just start messing around with your mind. I don't like messing around with people's minds anyway and I really don't wanna do it to somebody I'm... responsible for, like that. Like, you're not—this isn't you deciding to be my magic slave, this is—the closest I can get to just fixing you. I dunno if that made any sense."

"You could let me read your mind, then I'd have evidence. --Unless you locked away some of your memories and intentions? Is that possible? For some reason I'm thinking the word 'Occlumency,' do you have any idea what that is." 

—he smiles a little. "Yeah, it's uh, a magic thing from a book? Wow you don't know what Harry Potter is that's a trip—they're like, really popular books about this wizard kid going to wizard school, and in the books there's magic for reading minds and Occlumency is the magic for hiding things from people who can read your mind. Anyway I've only had this power for like three days, I have not really had time to get fancy with it. I guess you've got no good reason to believe me about that either. But I'll let you read my mind if you want."

Leah smiles; it's big and friendly and it makes her eyes crinkle up, and it looks incredibly weird on her. 

"It's probably safer to read your mind than not to. It won't protect me if you're malicious but it might help if you're merely very stupid. --Although it's hard to imagine a level of stupid that would be worse than being a bimbo."

He laughs a little, and then—

The most immediately obvious thing about Sean's mind is how embodied it is. His experience of the world is very heavily sensory and almost completely nonverbal. He looks at Leah and sees—he's still reading her mind too, but even if he weren't, he has an intuitive grasp of body language that feels like just directly perceiving the way someone feels in their posture and expression, and that perception is part of his sensory experience on almost the same level as colour or texture.

On top of that, then, he's also thinking about other things. Like what he saw when he first let her out into her own head. He's still a little in shock over it. There isn't much of her but all of her that there is is so... he's not thinking the thought in words, and probably couldn't come up with a word for it if he tried. But when he thinks about her, about who she is and what she's like and what it's like in her head, there's an edge of giddy disbelief to him, like he can't figure out how to reconcile his previous understanding of the world with the knowledge that it contains someone this amazing. The concept that the most wonderful thing in the world is people, the definition of sonder, those things resonate with him on a deep level—and even the rest of her, the drive to understand the world that he himself does not feel, he still sees as precious and good and important.

There are other fragments of thought floating around in there too. Memories of bits and pieces of this conversation from his perspective. The sensation of what it feels like to speak out loud in words when they're not remotely your native format. The firm conviction that of course he's not going to fuck with her if he takes ownership of her for this purpose, that it would be—something like unthinkable, to do that and then treat her as someone he happens to have power over instead of as someone he is knowingly and willingly responsible for. This sense of responsibility is novel and largely unexamined but very, very, very deeply felt.

All together, it's kind of a lot.

She giggles and starts bouncing. 

"This is the best magic ever."

Watching her giggle and bounce is overwhelmingly delightful. She's so good!!! Her happiness is so—visible and vibrant and—he wants her to be that happy all the time, he wants to own her and keep her safe and give her all the nice things in the world so he can watch her be happy about them—

"Hm. Can I see what you've been doing with your magic for the past three days?"

"Sure—"

He thinks back to when he got the power, the explanation he half-remembers. The guy in the hat was really not very forthcoming with information; he only even vaguely touched on the concept of owning people, for one thing, and left Sean to discover by experimentation that for example he can affect himself because his body is his. (He hasn't measured his new height but the one he feels comfortable at now is at least a few inches taller than his previous 5'11". He keeps reverting it whenever he has to interact with his parents at close range and one of these days he's gonna forget and they're gonna think they've gone insane.)

After that, most of what he's done has been drive around in his car picking attractive people up off the street and raping them, then erasing their memories of all the awful stuff and letting them go after what to them was a perfectly reasonable and friendly interaction. (His memories of this are... vividly experiential, the same way his thoughts are.) He got Chris that way, which is possibly the best thing that has ever happened to him, because Chris is fantastic. (Vividly experiential memories of Chris sucking his dick, and also of Chris discovering really good food for the first time.) Okay probably getting magic is the best thing that ever happened to him, but Chris is second. Leah might be third. Leah is very very good.

(It occurs to him, thinking back on this habit of his, that it feels... not quite right, to take away people's memories like that. It's certainly a better idea from a selfish perspective than letting them remember it, but it feels... dishonest. Like he's lying to them, a little. And lying feels bad. Not in a moral sense; in fact, almost in a sensory one. Like a screeching swipe of fingernails down the chalkboard of his brain. It's uncomfortable to deceive, uncomfortable to interact under false pretenses. Whatever took nearly all of Leah's self away from her was very much like a lie, in a sense, and concealing just a few of someone's memories from them is much less of that thing but it's still some of it.)

"...........how do I become your slave."

He shows her the memory of how Chris did it.

"Dunno exactly which parts of that were the ones that mattered, but," he waves a hand and finishes the thought nonverbally: he's pretty sure he remembers the guy in the hat saying something about people thinking of themselves as belonging to him, which implies that it's important that Chris meant what he was saying; and given the timing of when that magic tattoo showed up, it seems safe to conclude that the blowjob was also a critical component for some reason. He is really kind of confused about what the blowjob has to do with it. Like, yeah, it's vaguely thematic and all, but actually why though.

...Meaning it is hard. 

She closes her eyes and dredges up from somewhere in her memory the concept of speech-act performativity. 

"With this sentence," she says, "I become your slave."

...huh. He has no idea if that's going to work but he is immensely charmed by the thought process that went into trying it. It went by fast enough that he isn't totally clear on the details, but what he caught was—good the way that the rest of Leah is good.

"Do you think it has to be a blowjob specifically," Leah says, "I'm kind of horny and I'd like to get fucked. --Although if you fuck me you should probably cure any STIs I have first, I didn't use condoms."

"Well, I'm pretty sure I can do that—" he tries it, and his eyes flash gold, so: yes, "—and hey, if it doesn't work we'll have learned something, right, and then we can try again?" He was not especially into the idea of fucking Leah in the state he first found her in, but now that she's this version of herself he's kind of delighted by the idea, especially if she's into it. Actually it would be kind of terrible if she wasn't into it. Wow that's a feeling he can't remember having before.

"I wonder what being ridiculously sexually responsive feels like when I have a brain."

He bounces a little. "Let's find out!"

If he were more together as a person perhaps it would occur to him to try to arrange a more comfortable place for them to have sex than the driver's seat of a Lamborghini, which although excellent for all its intended uses is not really intended to comfortably fit two people; but he's horny and impulsive and he likes her and he wants her and he's mostly just thinking about how much fun it would be to get her off, so in fact he just reaches over to pull her into his lap.

Leah kisses him!

About ten seconds later Leah is making quiet whimpery noises.

Oh wow that's good. Wow that is just really really good.

You know what's an excellent use for mindreading magic? Finding out exactly what someone feels when you touch them in this or that way, and then building on that knowledge to learn how to make them feel all kinds of wonderful things. That is a really, really, really good use for mindreading magic. Sean is so proud of discovering this.

Whoever made Leah look and act like this seemed to have doubled, if not tripled, the sexual sensitivity of all of her nerves. 

Also, Leah doesn't have particularly many memories but she does remember that she can have orgasms from getting her tits fucked and this memory is giving her some thoughts about Sean lifting up her shirt.  

His eyes flash gold and now all of their clothes are piled in a heap in the passenger seat and he is free to touch her breasts unobstructed. He's never seen the point of titfucking but wow thinking about Leah having orgasms from it is casting the concept in a whole new light.

💖💖💖💖

She's not really 💖 having thoughts 💖 she's just sort of floating in this sparkly happy haze 💖💖💖 every time he touches her breasts it's like a little spark 💖 of electricity 💖

That's—actually maybe kind of concerning in context but wow does he ever want to fuck her—whatever it's probably fine and she is so very clearly having fun—yeah he is gonna keep right on doing this and see just how sparkly the inside of her head can get.

At some point his telepathy gives up representing it in words and starts representing it in fireworks.