CW: Demon AU, incubus Tony, fainting, NSFW

~~~

It hadn't been a huge issue up until now.

Tony was used to being a sex addict- he has been since highschool. But now- well, ever since he and Pepper broke up, he's been.. frustrated.

He's been able to keep the irritation to himself, mostly. But now- a month later- he's starting to have episodes of lightheadedness, headaches, and physical exhaustion.
He went to the doctor about this, of course, but they couldn't find anything wrong with him, no matter how many tests they ran. Frustrated and a bit desperate, Tony goes to the Sanctum.

"So, to what do I owe the pleasure, Stark?" Stephen asks after Tony walks through the door. Tony rubs his forehead a little. "I think I'm dying, Stephen, and no one knows what's wrong with me. So, I figured it's something supernatural and I-.."
"You got desperate and came to me, that it?" Stephen finished. Tony sighs, nodding a little. Stephen paced. "Can you elaborate on what you mean by that?"

Tony went on to explain his symptoms, sitting down because he started getting lightheaded. Stephen was puzzled for a bit, thinking to himself.

'Signs of sexual frustration, mixed with symptoms of dehydration..' Stephen had a realization, looking up from the ground suddenly to meet Tony's eyes. "When was the last time you had sex?"
Needless to say, Tony was caught off guard. His face went red, and he sat up quickly. "What?" He asks. "When was the last time you. Had. Sex" Stephen repeated, unbothered.

"Like over a month ago, why the fuck is that relevant?" Tony responds. Stephen teleported them to the library in the sanctum, holding a book.
"‘Succubi, and their brothers- incubi- are demons that feed on the souls and/or pheromones of their prey. If they don't keep themselves well-fed, they can die within three months.’" Stephen quotes from the book.

Tony was flabbergasted. "Uhm, what are sucky-bye?" He asks. "Succubi are female sex demons, incubi are males." Stephen explains.
"I'm not a demon, wizard-!" Tony bristles, offended. "No?" Stephen asks, looking back at the book and reading more aloud to Tony. "‘When Succubi don't feed, they seem to become irritated, irrational, and weak.’ Sound familiar?"

Tony scoffs, but had a feeling Stephen knew what he was talking about. He also didn't have the energy to fight back- actually, he felt quite faint, and ended up blacking out. Stephen caught him, carefully sitting down with him and thinking to himself.

~~~

Tony groans softly as he started regaining consciousness, Stephen looking over at him. He had set Tony on a couch, and was sitting at a table across the room.
"What the hell happened..?" Tony mumbles, sitting up. Stephen got up, walking over. "You fainted." He responds simply. "How long was I out..?" Tony asked, looking at Stephen as he sits on the ground in front of Tony.

Stephen thought about the answer for a moment before shrugging a little. "Ten minutes. How do you feel?" He asks. Tony sighs. "Well my headache is gone-... Why?"
"Just wondering." Stephen gave a smile. Tony, though, was skeptical. "... What'd you do?" He asks. Stephen tilts his head to the side in thought before answering. "I fed you."

"With what-?" Tony asks, confused. "With tetradecadienyl acetate." Stephen responds with a slight cheeky smile. Tony pursed his lips, a little irritated. "Make sense."
Stephen rolls his eyes, standing up. "Pheromones." He clarified, getting himself some tea. "Wh- like sex pheromones?" Stephen looks over at him, giving a curt nod.

"What did you do to me-?!" Tony started. "Relax. I'm not a sex offender. I didn't do anything to you; I did it to myself." Stephen interrupted, sipping his tea. "Well, okay, I did take a strand of your hair." He continued, holding said hair up.

Before Tony could ask any questions, Stephen started casting a spell. His eyes started glowing a little, and it seemed like he was reading something. After a moment, he looked over at Tony, eyes going back to normal.
"Your mother. Your mother was a succubus, making you a half human, half incubus offspring. That's why you're so addicted to sex- part of you needs it." Stephen explained to him.

Tony digested that for a moment before speaking. "S- uh.. Stephe?" He asked. Stephen looks at him, silently showing Tony has his attention.
"I.." Tony scratched the back of his head, before sighing and deciding not to beat around the bush. "Do you want to have sex?"

Stephen would admit he wasn't expecting that question- not directed at him, that is. "You and I?" He asks for clarification, to which Tony gave a small little nod. Stephan thought for a moment before nodding. "Yeah, alright."

~~~

That led them to where they're at right now, with Stephen up against a wall, lips attached to Tony's in a heated kiss. Stephen was letting Tony lead, tilting his head to the side when Tony broke the kiss and started trailing kisses along Stephen's neck.
Stephen groans softly, his hands on Tony's back trying not to scratch at him too harshly. He failed at doing so, however, when Tony started biting and sucking at his neck, eliciting several soft moans from Stephen.

Tony made soft noises along with Stephen, his hands going to undress him slowly. "Someone's e-eager huh~?" Stephen asks with a soft chuckle, though his cocky tone was overridden with the pleasure Tony was causing.
Tony pulls back from Stephen's neck slightly. "Oh darling, you have no idea how good this feels~" he murmurs, managing to get Stephen's robes off. "Ohh, I think I've got an idea, tiger~" Stephen responded, grunting softly when Tony started leaving small hickeys down his chest.

Tony took his shirt off quickly, capturing Stephen's lips in another kiss while working on taking off their pants.

Once their clothes were off, Tony spoke to Stephen, running his hands lightly along Stephen's thighs. "Now.." he mumbles, teasing Stephen a bit by not touching him.

"Now, you're mine~"