She's absolutely massive, looking to weight at least 500 pounds, if not more, which was apparent by the fact that her fat folded in on itself more than it seemed was humanly possible. Her thick thunder-thighs cause the room to shake, plaster raining down on you, while her chicken-wing arms ripple like water at every movement. She jiggles a lot, her massive belly never staying in one place, and her gigantic, (surprisingly) perky breasts bounce about like basketballs. Her face iss well rounded, although it's actually pretty cute and far from ugly. And, of course, there was the pair of small horns and the tail. Her tail has a love-heart shape at the end, and it's the same shade of light-red as the rest of her skin. Her hair is long and flowing, a similar shade of black to her horns. Overall, it seemed that she would be absolutely beautiful if she wasn't, you'know, fat. But you can't seem to take your eyes away, and pretty soon you're getting hot under the collar... or maybe it's just hell.
Just then, the demon speaks. "You're so adorable like this, but I'd feel bad about myself if I kept you as a child." She mutters, clicking her fingers. Just then, you quickly morph into the real you: a 20-something just out of college, with big plans. "It was necessary to get you to come here though. Reliving memories seems to be a habit you humans can't shake." She then said, turning to the blackboard and showing off her humongous ass.
You're still a little confused. "W-what are you talking about?" You manage to spit out, only for her to turn back to you. She's got a coy smile, and she stomps her way towards your little table.
"I just took a memory from your childhood and made you relive it. You got on a bus alright, it was just a bus to my home rather than school." She explains, hands on her hips with a piece of chalk in one hand and a pointing-stick in the other. "And before you ask why you're here, I'm about to answer that question, so shut up and listen, okay?" He tone of voiced bounced around all over the place, from lovely and cheerful and even alluring, to slightly bitter and mean-spirited. Then, she snaps her fingers again and a huge tome of writing appears on the blackboard.
"My name is Delianura, a gluttony-class succubus. I'm usually sent out to convince unwitting humans to gorge themselves silly, before consuming the negative energy that their souls produce because of this." She explained, pointing to that section of the board. The way she said it, it sounded like she really enjoyed the job. "But, I'm currently on vacation for a century, so I figured I'd get out a little and maybe bag me a hubby tubby." She pointed to another part of the board. "That's where you come in."
"M-me!?" You splutter.
"Yes, you." She replies. "I've been watching you, Bill. You're a very interesting guy. I've tried making you into a glutton before, but your will was too strong." She continues. You think back to that time you got really hungry during high-school, and how you managed to stop before it got out of hand. So she was the one behind that. "And I even tried to get close, once. Remember Jessica? Well, that was me." You remember her; she was the fat, nerdy girl in your art class that you didn't pay any attention to.
Delianura points to a different part of the board. "So, my plan was simple... convert you into a gluttony incubus, and then settle down with you for the next couple of millennia. I know you have the deep seeded desire of being fat, and being with a fat woman... your erection alone is telling me that." You cover your crotch, face red. "Of course, that means that you're going to have to do two things; Firstly,get fat, at least as fat as me, if not more..." She began, before seemingly puffing into smoke and appearing in front of you. "...and secondly, have lots and lots of sex with me." Her voice was low and husky, in a seductive sort of way.
You attempt to get out of the chair, but it's no use. You're stuck. "No, I won't, you creep!"
"Now, now, that's no way to talk to your future wife!" She growls, snapping her fingers again. You're in some kind of fancy living room, filled with red satin cloth and black leather furniture. "Now, make yourself at home. We've got a lot of stuffing to get on with if you even wish to get as big as me." With that, she's gone, with you alone in your underwear (she must've removed the rest of your clothes). You get up; there's a door, and a couch.