Oommf… a-ahh… I… feel like I… Keldia thought to herself as the bubbly magic sensation faded to a dullness across her whole form, limbs quivering weakly as Soul’s twitching length plunged down to its hilt, his warmth felt deep within her slickened tunnel. She huffed audibly, her forelimbs flopping on the bedsheets before her, a bead of sweat rolling down her brow as she felt herself growing warmer by the moment. Can’t control my b-body…
“S-Soul… what spell did you teach me-?” She gasped out, pressing her muzzle into the soft sheets as she squirmed beneath his ministrations. Something wasn’t right at all, she hadn’t quite expected the spell to immediately backfire into her! If anything she’d thought it would be some minor spell that would apply only to Soul, he’d always seemed the sort to want to try out at least a few of the less comprehensive transformations as she’d seen in the other pages of the book.
“Keldiaaaa…” Soul leaned down over her, pulling his length back enough to give him adequate space to send it slamming forth back into her folds, cutting off any words she could possibly have mustered with the sudden wave of electric pleasure. “You WERE paying attention, weren’t you?”
Keldia gulped, a drip of sweat beading on her nose and falling to the sheets as the stallion’s motions grew rougher, thrusting deeply in a perilous rhythm, her flanks and hind hooves almost dangling limply as she was skewered upon his penetrating shaft, dripping with lubricated arousal. A soft plap of Soul’s hefty orbs thumped against her as he hilted deep, the mare giving an inarticulate moan in response as she writhed as much as her muted body would conjure the energy for, face nearly buried in the bedsheets as Soul looked above her. Her heartbeat quickened, almost as though it would burst from her chest as she breathed heavily in unison, seeming to feel Soul’s own heartbeat in time to the throbbing of his cock where it lay lodged within her.
“It was ‘Body Assimilation’…” Soul said, grinning with a grunt, forcing his weight back down onto the hapless mare.
Keldia’s eyes grew wide at the words of the stallion, her mind still halfway sharp enough to realize just what the implications might be here, even if she couldn’t yet comprehend the exactitudes of what was to follow. With a flutter of her heart and a gasp, she struggled against the lethargy of the magic that was keeping hold of her body captive in its embrace. Just barely she managed to twist and squirm enough to the side of the bed, groaning with every thrust, until they both toppled off the side of the bed with a unified yelp and a heavy thud against the wooden floor.
The motion of the fall sent Soul plunging deeper than before, feeling the massive shape bulge against her belly with a visible throb as her rump was forced firmly against his crotch. A spark of magic followed between them as their heartbeats synchronized, beating together with heavy thump-thump. The mare squirmed frantically, but something was holding the two of them together, an unnatural tingle where the hilt of his shaft met against her quivering, slickened marehood, heat building up as unseen to the two, their flesh had begun to meld, fusing them together bodily.
“It’s already started… stop struggling.” Soul huffed breathily, his tongue hanging from his muzzle as his body shuddered with pleasure, the motion translating into the prone mare. “Better that you relax…”
On that last note she felt him throb, but not as before… the startling sensation of his hefty cock no longer quite felt like it was skewered inside her. The throb ran through her whole body, shuddering from her rump and running through her spine, eyes widened as her fuzzy mind contemplated the sensation. He felt diffuse within her, the warmth spreading inside her with a disquieting fullness, each and every twitch and throb she’d felt before was magnified, traveling through the whole of her belly.
Her belly was swollen, a strange stirring deep within as she felt her insides gurgle and twist, the muscles in her back wanting to tense up entirely and stiffen along her length in ways she’d never known before, like she had slept in the strangest angle all night and everything had locked up come morning.
“Hrnphh…” The mare murmured, trying to pull away, but to no avail… WHAT was happening to her!?
I know it’s not the point to this comic but shouldn’t, logically speaking, this spell work the other way around? She cast it intending him as the target. He’s the one inside her. If anything it’s setup for her eat him.