Spike walks downstairs to talk with Twilight, but as he opens up the doors to the main library, she is nowhere to be found. He takes a moment to look around, spotting that a few books were pulled out of the illness section, one from the dragon section, and one from the spells section.

He begins to look through the books himself, but the growing heat that was burning him up from the inside forces his hand. He groans as he puts back a book on magical creatures and begins heading up to Twilight’s room, assuming that to be the only other place in the castle she would do research that wasn’t the main library.

As he walks towards it he finds himself pulling at the collar of his shirt repeatedly, it already not helping with the heat stuck inside him. He tries to breath out a jet of flame to get rid of it as well, but finds it acts only as it did normally.

Spike gets to her room and opens up the door, used to not really needing to knock around her. This turns out to be a mistake as Twilight turns to him in shock, being almost fully undressed as she was trying to change into a more formal outfit, as she was expecting some royal company soon.

Spike jaw drops as he gets a look at her bare form. Her breasts were smooth and looked quite soft, with her nipples a few shades darker than her… (skin, fur?) the rest of her body, up lighter than the purple of her mane. His eyes then fell from them down her smooth stomach, and down to her pussy. It wasn’t much to see on the outside of her body, a bit of pink flesh above to lips held close together, making it look like a small slit instead of a real hole, but he knew that it would stretch around his cock nicely-

Spike shook his head for a moment to clear his thoughts before closing his eyes as he felt his cock begin to push out of his sheath once more. “I-I’m s-so sorry Twilight! I-I’ll j-just-” He says as he turns to leave, before he feels Twilight pull him in quickly. He slowly opened his eyes to see Twilight resting a hand on his head before sighing.

“Your heating up again…” Twilight laments as Spike stares into her chest for a moment, able to see that she still did have fur, it was just so soft and smooth it was barely able to be seen as such. “Ugh, Spike, how does this keep happening?”

“Do you know how hard it is to stop asking questions?” He asks before he realizes what he said and adds, “Um, you wouldn’t mind helping me out again, right?” He takes a deep breath before wincing as he feels his temperature skyrocket!

Twilight pulls back her hand from his intense heat spike before saying, “Of course not Spike! Yikes, maybe I need to work on a silence spell for you later…” She then quickly puts him onto her bed with her magic, before enveloping his balls in her magic once more.

Spike feels her magic do it’s think again as he lets off a soft moan, but quickly his mind goes to imagining other ways she could help him. He saw her soft lips pushing down his cock as her left hand massaged his balls while her right one she used to give herself her own relief as she served his dragon cock! He quickly shook off the thoughts once more as nothing more than an annoying fantasy, as she was just trying to help him, further confirmed by her grabbing a measuring tape to begin analyzing his body to see if he was having any additional symptoms from what she still saw as some form of dragon puberty.

Twilight looked at his cock with a small blush as she heard the ‘pop’ that meant it was fully free of his sheath. Her magic coiled around it and began to do its job once more, even though Twilight began to check on it every few seconds. She assured herself that she was making sure the spell wasn’t messing up in any way, and not that she wanted to imagine she was doing it’s motions instead. She turned away after a bit to try and clear her mind, though she could feel the dampness of her legs telling her that she had been enjoying that little show a bit more than last time. She shuddered as she moved her hand down to her pussy, and pulled it back up as she saw her own juices drip off of it temptingly.

Spike, on the other hand, was laying there feeling… Well, pleasure from the magic Twilight had cast of course, but it didn’t feel as potent… He was sure that last time he had already come by this point, but now he felt only halfway there. He tried to remember why as he remembered the banned book he had accidentally connected himself to, and how one of the stallions of the books had been a unicorn. If he had done something like this in the book to get off on his own, then maybe he couldn’t cum from that anymore. If that carried over to him, then that wouldn’t be good.

Spike took a deep breath in as he looked over at Twilight, who still sat still with her back to him, trying to resist the temptation to try and get herself off while he was distracted. “Um, Twilight?”

Twilight jumped as she heard Spike's voice as she turned around with her hands behind her back, then remembering her lack of clothes and moved then to cover her privates. “Y-Yes Spike? D-did I make the spell too fast?”

“N-No… I-I don’t think it’s working though.”

“...”

“...”

“... What” Twilight asks as she looks over at his cock, still rock hard but not even precum has leaked out of his cock yet. “H-How? It worked last time!”

“I-I’m not sure” Spike lies, not wanting to have to explain his idea about what happened to his sister.

Twilight groans as she moves closer to the bed and looks at his cock again with a gulp. She reaches a hand out and touches it lightly, causing Spike to moan loudly. She takes a deep breath as she wraps her hand around his shaft, and squeezes it tightly.

“Too tight!” Spike says as she pulls her hand back, before trying again, but doesn’t squeeze it this time.

Spike moans lightly as she begins to pump up and down on his cock with just her hand now, even having gotten rid of the magic around his balls by accident. She moves closer to the bed as she begins to finger herself, moaning lightly as kept working on his shaft, a smile creeping up her mouth.

Spike grips the bed as his mind fills with the want of forcing Twilight's head straight onto his cock, trying to resist as best he can becoming like the protagonists of those books. Twilight sees this as he is about to cum, and begins to work faster on both his cock and her own pussy. “Oh! D-don’t stop!” Spike says with a moan.

She keeps going as she places one of her elbows onto the bed itself, smiling more as she feels Spike’s warm precum drip onto his hand, barely resisting the urge to open her mouth wide and lick it up. Her fingers move faster within her as they try as hard as they can to bring her to an orgasm, as she stops even pretending to fight them. She wanted to cum while jacking off Spike. She wanted to cum while helping him handle this unknown heat. She wanted him to keep this forever if it meant she could help him like this!

Spike bites his lip as he holds back a moan, only to hear Twilight scream out one of her own as her back arches, allowing him to finally realize that she had been mastrobating the entire time she was jerking him off! Spike felt something within him cheer that fact as he came once more at the sight, as a roar forced its way out of him with an accompanying jet of white hot flame! He and Twilight both felt his body cool, as Twilight got an idea.

“Oh, I’m glad you managed to cool down Spike~” She says as she stands up, her own juices leaking down her legs and dripping off her hand, as she reaches up to her face with her other one, cum still on it. “I just hope you don’t need this too much. This sort of thing is very… addictive”

Spike's eyes widen at the thought, as he says before thinking, “Wait, will we get addicted to this?”

“Of course we will silly~” Twilight says as she licks up the cum on her hand as heat fills Spike once again as he realizes his mistake once more.

Author's Note

Here is the next chapter. Once more, I would appreciate a beat reader or two, as well as any suggestions.

Here is the poll again. It will be closing on the 30th.
https://strawpoll.com/polls/kogjv0JxPg6