A stomach so vast that she'll be an outcast in her own society you say? Ma'am you may not understand what alternate universe I've put you in. By way of stomach, tiddies, thighs, ass, or all of the above; practically every character here is at least a little horny for fat girls.
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The Sorceress' hands started glowing and her whispers echoed throughout her cave. The same sort of spiraling magic Mary had seen surround the fire earlier was now surrounding her. She was still processing what the Sorceress had said. My stomach so vast that I won't be able to get out of the cave? she thought, Can this lady possibly hit any more of my kinks while she's got me tied up here?
Mary began to wonder if what the Sorceress was saying would even be possible. The sparks from the spell were calming down a little, and Mary wasn't feeling any different. She started to speak, "E- excuse me Sorceress? How quickly should I be feeling the effe-" Mary was cut off by the realization that she was absolutely already starting to feel a little bloated. The Sorceress grinned, "You seem oddly impatient to receive your punishment, though I can tell you're feeling the effects now," she swooped in closer to Mary's face as she continued, "and you're going to be feeling these effects until you're too wide for the entry." Acting mostly on instinct at this point, Mary responded, "How long will that take, Sorceress?" The Sorceress grinned again, "Depends on how well I cast it. Could be minutes, could be hours," she paused as the grin deepened, "or you might be experiencing this for days."
The bloating feeling kept growing as Mary hung there. She was relatively used to this feeling, seeing as how one of her favorite past-times was expanding her stomach as much as she possibly could, then being fucked (and sometimes while being fucked as well), but this felt a little different. Usually, at the size her stomach had already bloated to, she would be feeling tight as a drum. Now, however, her stomach wasn't getting tighter at all. It was almost as if her skin was permanently stretching fast enough to keep up with the bloat. At the rate this was going, Mary had a hunch that she wouldn't be under the spell for too long before she would have trouble exiting the way she came in. Mary couldn't help it now, her fear had practically disappeared in an ocean of arousal.