Unknown time:

Celestia was certain she’d been making progress. Her father Solaris had been begging her to stop with her stupidity- a demon not being evil? What sort of insanity was that? They were monsters, unlike anything else. Always thinking about themselves, while they’d kill and steal unashamedly, even bragging about it.

He hadn’t dealt with Theo, though. Celestia could feel it. His ‘heart and soul’ were pure (for a demon). He was powerful, incredibly so, but every ounce of his power was gained by beating back other demons, and taking it from them. He had been surprised on their first meeting that anything would summon him, but upon looking him over the twenty year old Solar Princess was ecstatic. Now it had been nearly three years of working to convince him to join the Equine race and help them. Since Solaris was busy working to make sure the fledgling Equestria stayed together, she had plenty of time outside of her lessons to work on her ‘pet’ project. This ancient demon would be wonderful- it’d scare off other demons, and he’d know how to help Equestria if anything horrible came up.

Theo, however, the towering eight foot tall demon that he was, had (at least for the first year) been trying to steal her soul, and make the beauty into a slave for himself. But now, he felt something he’d never felt before, regret. But regret for what? He hadn’t done anything to her. He’d just talked and discussed things with her. Hell, he’d gotten her certain tomes, ones that she and her family couldn’t ever hope to attain. But, now three years in, he was… worried.

But why was he scared of joining the mortal race? What was he worried about? He’d be able to run through Equestria and the greater planet at large scott-free, an incubus being able to use the races of this planet as his own source of power, with no other demons being able to tap- it was a tantalizing and absolutely delectable idea. But now, he wasn’t sure. His thoughts of railing the virgin princess were still drenched in lust, but he wasn’t sure that was the only thing in his thoughts. He’d beat himself over the stray thoughts, cuddling? What the fuck was wrong with him? Love is for the weak, wasn’t it? Worst of all was uttering those dreaded words in the disgusting nightmares he’d suffered for the last year and a half. ‘I love you…’ He cringed at the thought… or at least he used to, now it was growing more and more prevalent, haunting even his waking life.

Celestia had been feeling his disconnect and the sundering of his thoughts, it was obvious that she had a profound effect on him. Now, she intended (both to sate her own curiosity and her growing feelings for him) to give him a chance to take what he had wanted… she was going to sleep with him. She should have been scared, losing her free will, her soul, her family, if he decided to take her as his own. But this fear he felt, the worry, the shame it was strengthening her resolve. She’d force those out of him, and bring the straggling ancient emotion he was hiding to the surface. If he spoke the utterance she knew he was scared of, than her entire time with him was successful, and… she could finally say she felt the same way.

For nearly ten minutes, the massive incubus and the Solar Princess stared at each other, but whenever their eyes met, they looked away. The air was thick and heavy with anticipation, but neither knew for what. Theo was hoping she’d let him out, and… perhaps they could go walk around the garden just talking. Celestia was worried about the incubus taking her first time. It might be the only time with a stallion she’d ever have. If only they could have read each other's thoughts. They’d both be shocked, and perhaps it’d send them both over the edge.

Theo broke the silence, his voice, usually strong, mirthful, and very dominating, was meek. “Celestia… may I request something?”

Her eyes lit up and she smiled, “Of course!” She nodded, approaching the sigils that marked the barrier between the two.

“Perhaps… could we walk around the garden? I… rather liked the flowers and animals all around here.” He admitted, laughing quietly. Within a moment he felt the oppressive sigils die down. Celestia having broken all of them in her excitement. Had this happened a year or two ago, he’d have dove at Celestia, dragging her back with him. But now he only stepped out, now inches from each other, the closest they had ever been without any protection.

Celestia was far from scared of him, and grabbed his hand leading him into the garden. The two spent nearly four hours together, the animals not scared of Theo despite him being a demon. He’d never honestly touched any animals or smelled flowers like this before. For him it was a heart pounding experience, Celestia was just giggly watching him peel back and get bouncy when a deer approached him, or birds landed on him. It was adorable to watch him, and every now and again she’d grab his hand again, receiving a squeeze from him.

“You’re really enjoying this.” Celestia laughed. Theo smiled a little.

“It’s all really amazing.” He nodded, petting a deer that was nuzzling against him.

“Why don’t we go to my bedroom, and spend the rest of the day together?” She offered, “I can have the castle staff bring up food and drinks for us.”

“Then I might as well do this.” He sighed, his eight foot tall form shifting to a smaller six foot six form of a pure pony. A unicorn to be exact. He was handsome beyond recognition. Before, he showed off thick muscles and various other sexual attributes. The muscles were still there, but he was now clothed in what could only be described as casual wear. A hoodie (which at this point Celestia had only heard about from him) sweat pants, and a bandana keeping his redwood colored mane back behind his head, she noticed the obsidian streaks of color through his hair like highlights. His face was a cardinal red, his fur shimmered in the light, making him stand out even more. He didn’t look in the remotest sense of the word, demonic. He looked like a regular unicorn. All except his crimson eyes, they caused her to shiver. On his body they were perfect, they didn’t drill into you, as if tearing apart your very soul, they were soft, caring, and quite beautiful.

“My, if you had approached me in that form earlier we might have gotten much closer, a lot sooner.” Celestia teased, squeezing his hand tightly. He smiled at her, almost bashfully. She found he even more cute now, her apprehension at taking him into her sanctum fading.

“I’ve… been working on it for a while now. I can’t change my eye color…”

“You shouldn’t have to. They’re wonderful on you.” Celestia complemented, smiling shyly. The two walked, playfully bumping into each other and occasionally smiling. There was a small spark between them, and it was finally nice for them both to be able be together in private.

Solaris had felt Theo get summoned and was watching them for a while. He was going to step in when his daughter broke all of the wards she had made, but Theo’s reaction, and his desire to just see the plants and animals in the garden lightened his heart. He truly didn’t belong as a demon. He didn’t make any more moves as the two vanished into Celestia’s room, the door closing behind them.

“Please, just don’t hurt her.” Solaris said under his breath. Now revealing himself, he walked slowly up to the door, knocking on it. Celestia opened the door up, pausing at the sight of her father. “Hello, honey.” Solaris smiled warmly.

“Hi dad.” Celestia greeted, though she didn’t budge from the door, wanting to hide Theo from her father’s ire.

“I already know he’s in there.” Solaris sighed, “I’m not here to kick him out.”

Celestia’s eyes narrowed. “How can I believe that with the times you’ve tried to destroy him?”

“Because. I saw what he wanted. And how he’s not evil.” Solaris stated firmly, crossing his arms.

Celestia remained quiet for a moment, only to jump as Theo touched her shoulder. She sighed, stepping back from the door and right into Theo’s arms, surprising her even more as he hugged her for the first time. She blushed and snuggled back into his relaxing warmth, it was strange almost like her body needed it. He returned the cuddling, resting his head on her shoulder. His eyes shut as her mane danced against his nose, bringing her scent to his fullest attention.

Solaris didn’t step inside, already feeling that she was much safer alone with Theo than she’d be surrounded by guards. It was frightening to think a demon would protect one of his daughters, but it was equally as relieving seeing the soft blush and smile on Celestia’s face.

“Just… keep her and Luna safe.” Solaris said quietly. He didn’t need Theo to say anything, he could feel his eyes speaking more volumes than even the massive library of the castle contained. “Enjoy yourselves… and please, keep everything contained.”

“I’ll make sure we don’t leave this room.” Theo laughed, Celestia elbowed him playfully, the two smiling wider at each other.

“Good.” Solaris chuckled, “If you need anything come find me, or a servant.” He left the two alone again, the door closing as he vanished.

Celestia turned around in Theo’s arms, staring into his eyes. As if they both already knew what should happen, their lips touched. It was her first kiss like this, and Theo wasn’t ever one to kiss those that he’d fed off of in the past, but he wasn’t feeding off of Celestia, he was determined to love her. She shivered as his tongue entered her mouth, their tongues colliding and entwining in an intimate way. His hands slid over her back in a comforting manner, though never for a moment did Celestia feel tense, she knew he held no sway over her, he didn’t even try to. Not for the longest time. This is what she wanted. She felt this would be the perfect moment for them, and she’d remember whatever came after for the rest of her life.

Theo was determined to never leave the warmth and new found stability she brought to him. She pulled back, their lips sliding away, despite their soft lips leaving, for a few moments their tongues remained attached, slowly sliding back. They were both panting and their eyes had both nearly slid shut.

“My… if your kisses are this good…” She purred. He chuckled, kissing her neck.

“You won’t forget today. But, I promise to make sure every day you spend with me will be amazing.” He whispered softly. She blushed, leaning into him. He picked her up, carrying her to the bed. The princesses of the sun gasped as he laid down atop her, drawing her back into his warm lips. Her eyes snapped shut, the two cuddling and loving each other. She’d never let a stallion touch her like this before, his hands teasing and caressing her body, only four places did his loving hands avoid, her breasts (which were pressed into his chest), her marehood, her horn, and her wings. Every time his brushed her plush flank, his fingers dug into it, squeezing and groping it. She moaned unabashedly into his mouth, loving the feeling of her body being worshiped like it was. Soon he pulled back from her lips leaving her gasping for air, her heart pounding. He pulled his sweatshirt off, throwing it to the side. Now she could see his cardinal colored chest, and the muscles he wore so proudly. He wasn’t just handsome, he was absolutely hot, now more than ever before, and Celestia knew he was all hers. She took the lead now, running her hands over his muscles, shivering at knowing how strong he was.

“Oooh… Theo…” She breathed out, smiling shyly. He grinned down at her grasping both her hands, squeezing them lovingly.

“You are a GODDESS.” He affirmed, now drinking in the sight of her fully clothed body. He’d noticed how much she’d grown over those three years. Her chest and ass growing wonderfully, her once DD breasts were now a solid F verging on FF, her ass had grown just as much, though she wore those curves well. Her dresses always accenting it. She definitely turned heads and drew so much attention to herself. She’d also nearly grown a full foot, her horn and wings growing as well. She was becoming a true alicorn, her size growing to match her power.

“You’re making me feel like one.” She giggled, her magic causing her dress to slowly disintegrate, she didn’t care about the cloth or the material. She could just get another one, for now it just hid her body from her lover's gaze. And she needed to know how much he’d worship her. As the last strands vanished from existence Theo licked his lips, leaning back down into her neck. He teethed and kissed her flesh, causing her to moan and squirm. His hands slipped back to her uncovered flank. His flesh pawing at hers, now she could feel his own arousal. She knew instantly why he chose loose fitting clothes. The bulge was massive, she could feel it throb and pulse with his steady heartbeat. She slipped her hands into his pants, feeling his cock throb in her soft hands. She shivered even more. “A… am I a goddess… or are you the god giving a lowly mortal your love and affection?” Her voice quivered, almost fearful of the size. His lips returned to hers, drawing her attention to his tongue and love. Her hands grasped his cock, fear fading as he caressed her cheek.

He pulled back, “I love you, Celly.” He whispered, her heart fluttering at his words. She smiled.

“I love you too, Theo.”

In that moment the last of their clothing was gone, his one and a half foot cock standing proudly across her stomach. The leaking tip nuzzling her breasts, leaving his pre smearing her fur. Her eyes widened at the sight. She had only just grabbed the tip and it barely fit in her hands, the shaft itself was thicker still, clearly a tool made for pleasure and impregnation, but he had clearly re-worked it many times, as it was equine in nature, looking distinctly pony, with no extra features she could make out except its’ size. Seeing her trepidation, Theo’s eyes widened, and he got off her instantly and was sitting on the edge of the bed. In a moment Celestia was beside him.

“I’m rushing too much aren’t I?” He whimpered. She simply shook her head.

“Far… far from it… I just didn’t expect such size on you…” She assured, caressing his cheek. They shared a momentary kiss, and Celestia studied his body more. His body wasn’t just built to be hot, it contained muscles made for fighting and killing, at least she could assume as much. Nothing on him was just ‘for show’ he was a specimen beyond words, even his virility was equal to that of the entire city she lived in.

She shivered as she looked at the sack resting on the bed. His balls were triple the size of her fists, clearly full and achingly so. The veins on his thick meat were just as aching and harsh, hell now that she looked at him, he was in pain. He was so pent up, and it made her heart stop. Why would an incubus of his power ever be so pent up? Didn’t he regularly sleep with the succubi and other mortal species?

He was in physical pain from how pent up he was, but… that wasn’t the only thing causing him pain, he was weak… he’d been holding back for… “Theo, are… are you in pain?” She questioned. He shook his head, not looking at her. “Oh my… you… you’re in pain because of me! Aren’t you!?!” She nearly shouted, standing up as her eyes went wide.

“I knew… I knew we shouldn’t do this… I… I’ll j-”

She for once got angry at him, slapping him, causing him to reel back. Her glare was piercing and chilling. “No! You will NOT leave.” She growled, towering over him, making him feel so much smaller and weaker without her. “You won’t leave me.” She said in quivering voice. Her strength wavering as despair flooded in.

She didn’t need to finish, Theo launched himself at her, he clawed at her, drawing her into a kiss that drained all emotion except their combined sorrow out. Their pain was amplified millions of times. They should have been on the ground unable to keep conscious, they should have died from the pain. But their tongues touching erased it all, leaving only a void in each of them, a void that was filled when their arms wrapped around each other. She pulled back, whimpering even more as they held each other, his arms tightening around her. He pulled her instantly back into the bed, this time their bodies melting under the covers. The blankets wrapping magically around them. The two beings cuddled there, whimpering and sobbing. Her head pressed into his neck. There they both broke down, all at once he started speaking so fast, and so hard, his voice quaking more than she’d ever heard it. All he was saying, repeating really, “I love you!” It tore at her heart, she realized how much he had begun to care about her and how she’d changed him so much. He wasn’t a demon anymore, that was just a guise now. Then she realized, every time she or somepony else had banished him how painful and lonely it must have been. How all he cared about was her now. She squeezed him so tightly, she was scared she’d hurt him. But he only nuzzled in harder, not wanting to leave her. “Please don’t send me back! Oh GODS PLEASE DON’T SEND ME BACK!” She’d never heard him beg before, it wasn’t something she thought he was capable of. He was always so strong and sure, always so… powerful. But here he was absolutely weak and quivering, her arms the only thing bringing him strength now.

“I won’t ever send you back! I swear that on my life!” Celestia promised, kissing his head over and over again, now bursting into tears. By now, all thoughts of sex had faded and they only wanted to wash away their fears in each other's arms. His cacophony of begging and, ‘I love you’ was drowned out as he began to sob in full again. It was horrible to hear, nothing could ever compare to the pain he felt, and now she had the chance to wipe it all away. By now, the ENTIRE castle had been alerted to the crying and wails in Celestia’s room.

Her bedroom door had caved in as Solaris, and Nebula had barged into the room, the young Luna trailing behind them. Nebula already knew what to expect, she'd felt the fear and sorrow closing in fast on Theo. The shame he felt by being with Celestia was only compounding and had finally reached it's peak, sending them both over the cliff. Solaris however took all of it as a ploy, and his trust in Theo had faded completely, and he was about ready to annihilate the demon, sending him in pieces back to the abyss. He'd been right all along, he was a demon, and this proved he just wanted to harm his daughter all along.

Celestia’s attention snapped to Solaris, anger and hatred filling her eyes in a way he never had seen before.

“You… will…” She began slowly, tears still coming down her face. “NOT HURT HIM!” She growled, her horn lighting up, but before anything could happen to Solaris, in unison Luna and Nebula’s magic lit up, shielding the stunned alicorn from the barrage of murder that had been launched. Celestia’s arms tightened around Theo as her magic died down, her point having been made in full. Solaris stumbled back, his eyes wide. “You won’t hurt him… you won’t take him away from me… you won’t send him back… he doesn’t deserve that torture…” She broke down, now sobbing as well. Her father, sister, and mother watched in agony, Celestia curling up even more against Theo. His body shaking so violently they could swear he was seizing. Everypony backed out of the room, fearful of what Celestia was truly capable of. But for now she seemed to distressed and distracted to do anything besides cry into Theo’s mane. The two were left alone once again, but by now they were both far too tired to do anything and after hours of crying and shaking they had finally fallen asleep.

Author's Note

I hope all of you enjoy this new story, it's going to be a long one. Though this won't be stopping either Avali or Fallen, this is just an idea I decided to start and now have the best help ever for!