As Jason and Annabelle finished chanting the spell together, the paper they read it from caught flame, rising into the air and vanishing. Jason's heart raced, imagining a tingle and the world spinning. He was finally about to-
Nothing happened.
Jason frowned and looked down at Annabelle. The previously rather ornery whore was smiling now, so that was a change. Jason felt cheated. He'd spent so much money on that spell. On Annabelle. She was probably having a big laugh in her head at his expense. She'd been rather angry and sour since he'd met her. It took a lot of convincing and more than a little cash to get her to read the spell along with him.
Then she spoke and Jason was so confused.
"Oh wow!" Annabelle's voice was the same, but her inflection was different. "Those are my tits now!" She glanced down at her own breasts with a giddiness that seemed uncharacteristically earnest coming from a prostitute. She glanced up at Jason and grinned, "You're probably very confused. I'm sure you didn't believe me when I told you that was a bodyswap spell, but now you've got my dick just like I've got your tits. For a few hours anyways."
"What the hell are you talking about?" Jason grumbled. Was she baiting him? Roleplaying? "I'm still me!"
The expression on her face changed to one of shock. Either she was the greatest actress ever, or her next words were the truth, "Oh shit. I'm- uh- I'm you too."
A rushed game of questions where she revealed a rather intimate knowledge of Jason's life convinced Jason she was telling the truth. She was him.
"Shit." Jason - the one in his body - said, "What should we do now?"
"Isn't it obvious?" Jason - the one in Annabelle's body - said, "I want to know what it's like to have sex as a woman!"
So they fucked.
"Oh fuck it's so good!" Jason/Annabelle groaned quite wantonly as Jason/Jason pounded her from behind. Jason/Jason was enjoying himself too, but he was pretty jealous. He wanted to know what it was like to have sex as a woman! Still, it was pretty hot hearing her moan, and her pussy was fire. When she came, he was right behind her busting his nut all over her ass.
"Ohhh man..." Jason/Annabelle moaned as the cum on her ass cooled, "So worth it!"
Jason/Jason frowned, "Are we going to try and figure out why the bodyswap spell didn't... swap?"
"We could, or... I could hop in the shower to clean up and you could join me." Jason/Annabelle smirked. "I need to do that again. As many times as possible."
How was Jason/Jason supposed to argue with that? He might want to know what it felt like to be her, but that didn't mean he didn't want to fuck her too.
After some romping splashy wet fun in the shower, Jason/Jason was feeling a bit more calm, and a lot more jealous. He was pretty sure she'd cum twice that time.
"Oh I totally did." Jason/Annabelle said when he prompted a bit later as they recovered in bed, "It's so awesome being a girl!"
Jason/Jason was pretty annoyed how insensitive she was being. She knew how badly he wanted to experience was she was feeling, they were the same goddamn person up until just now! Yet there she was, totally rubbing it in!
A thought crossed his mind: was she - and by extension he - kind of an asshole?
"Oh, you're looking kind of pouty." Jason/Annabelle said, "I bet you're thinking you can't go again, but why don't I try to even up the score?" She sank down until her mouth hovered over his dick, "What guy hasn't wondered about sucking their own cock, amiright?" She said, and promptly began to blow him.
It took some doing, but she eventually managed to get him hard. Despite clearly being new to the act, she knew his dick as well as anyone.
Jason/Jason was pretty mad at her by then, despite what she was doing with her mouth. Even that she seemed to be enjoying, smiling and even giggling occasionally as she struggled to fit all of him in her throat. He wanted to know what that was like!
It was small retribution when he blew his load all over her face. Of course she enjoyed that too.
By then time was about due to be running out. She laid there with his cum on her face, glancing at the clock, waiting.
And waiting.
And waiting.
"It's supposed to have worn off." Jason/Annabelle said with a bit of urgency.
"You thought it was going to wear off?" Jason/Jason chuckled, "What exactly did you think was going to happen to you then? It's not like we could swap back, we never swapped!"
"I don't know!" Jason/Annabelle was a bit panicked, "I thought maybe our memories would merge, or like, maybe I'd just overwrite you and go back to being me - this was only supposed to be temporary!"
"Overwrite-" Jason paused, feeling terribly self-reflective in that moment. Was he really that much of an asshole? If he'd become her instead of staying himself, would he really have so casually expected to erase him? "You know- I'm sure you thought you were the lucky one, being that you're the version of my who got to live out my fantasy, but guess what? The spell didn't fucking work. You're a copy of me. Poor Annabelle, but I get the feeling she didn't have a lot going for her, and now, well, you're her. Congrats, you're a whore, and that's not my problem."
======
Jason/Annabelle pleaded with his alternative self to not leave him that way, but Jason/Jason was tight lipped as he dressed and then left. Alone in the hotel room, feeling more terrified than aroused, he heard a voice, but it wasn't his voice.
You asshole.
The voice was familiar. It sounded kind of like his new voice, but the timber of the words was-
"Annabelle?" Jason/Annabelle said.
Yeah. If I try, I can feel and see and taste and hear all the fucking things you do. I can hear all your fucking stupid guy thoughts too. Oh, boo hoo, you're stuck as me while the other you gets to go off and live your life. Asshole. Both of you.
"But I'm not-"
Well you are now. And I have to be fucking copilot in my own body thanks to your stupid spell copying you ontop of me. You've gotta be me now. Good thing you liked the sex, I know I always did, cause now you're going to be having a lot more of it...