Warning: This is a very unhealthy relationship (though it gets healthier down the line, like way down the line.) Eventually Frostiron, seriously way down the line.
Chapter 1: Lady of the Tower
The first time Loki met Pepper Potts he was laid out on the hard floor, back pressed against the cold window that made up the south facing penthouse wall. He had been watching Tony talk to Jarvis in the kitchen as he pulled apart a small robot.
He was completely ignored, completely unimportant.
Despite the unyielding floor beneath him and the hollowness inside him, Loki was… comfortable, for a lack of a better word.
His long black hair cascaded over the gold and white marbled floor. His fingers tapped a silent pattern, not able to just stay still. His eyes never moved away from Tony. The other man just seemed so happy, so content in his own little world of mechanics.
"Sir, Ms. Potts is on her way up." Jarvis announced. Tony's hands paused for just a fraction of a second, a smile forming on his face.
"What is she wearing?"
"A cream Couture business dress from the spring 2011 collection. She looks rather fetching, if I may say so." Jarvis reported, dutifully.
"Please tell me she's wearing that bright red lipstick."
"She's reapplying it as we speak."
Somehow Tony's grin became wider. He went to the kitchen sink, washing his hands.
Loki didn't know what to do. Tony had told him that Pepper knew he was there, so he didn't have to hide himself. But he didn't know if her anger towards him would transfer to Tony. And if Tony was angry… he could kick Loki out.
Loki curled up into a ball.
There was no place for him, no realm or house that would willingly take him in.
He could always shape shift. Loki knew this, but he also knew that would only hide who he was on the outside. They'd see who he really was even if his face was hidden.
The sharp clicking of heels pulled Loki out of his musing.
An impeccably dressed woman walked in with an air of confidence around her. She immediately went up to Tony and embraced him.
Loki didn't understand why she reapplied her lipstick just a moment ago, considering the majority of it was now on Tony's face and neck.
"Grease and lipstick, the only things I ever want to stain my shirts." He murmured and Loki only barely heard him. The redhead pulled back, rubbing away the most obvious marks on his skin with her thumb.
"I'd rather you have no stains."
"I'm pretty sure half my stains are your fault, you dirty bird." He nuzzled against her neck and she giggled.
"Oh shut up Tony."
He whispered a few more things to her. It was a very private moment and Loki felt oddly jealous. He made to turn away, but the slight noise caught Pepper's attention.
"What's that?" Her words cut straight through him.
"Oh geez, Loki. Is that how they taught you to greet a lady up in Never-Never Land?" Tony covered his face with his hand. Loki scrambled to stand up, brushing away any dust he may have picked up. "I'm sorry Pepper. I should have made him leave the room. It's just so easy to forget he's there sometimes."
An odd combination of emotions overtook Loki. To anyone else they would feel disconcerting, but to him… it drove him feel crazy in the most intoxicating of ways.
His whole body was awash with excited embarrassment, heady lust, and spiraling self-disgust.
"It's fine. You know I'm used to dealing with all sorts." She gave Loki a dismissive look before turning back to Tony. "Besides, I'm sure you can make it up to me somehow."
"Definitely." Tony knocked aside the robot he had been working on for the past few hours and lifted Pepper onto the counter. He paused, just for a moment, looking to the Norse deity. "Go away."
Loki nodded in response, hurrying to his room. The last thing he glances was Tony reaching into the fridge while Pepper blushed madly.
Pepper (or Ms. Potts, as Tony instructed him to call her) was not around often. The second time Loki saw her it was a month later.
He was in the living room (tired from the thorough fucking he just got), sitting on the floor, leaning against the couch. The TV was on, an animal documentary playing that neither Loki nor Tony were paying attention to. The latter was on a tablet, editing schematics. The former was caught in the subtle sensation of his hair being brushed through. Tony lazily twisted and pulled at Loki's dark locks. It was a constant reminder of Tony's presence. Not that Loki could ever forget.
Pepper came in, talking animatedly on the phone. She only stopped briefly to give Tony a quick peck on the cheek before heading to their room.
Once again Loki was jealous of her.
He'd been living in the penthouse for two months and he had still not seen Tony's room.
Loki couldn't fault him for that though.
He wasn't enough… That room was only meant for the people who mattered.
Pepper came back into the living room in casual clothing and Tony immediately pushed Loki away in favor of Pepper, in favor of someone who wasn't a monster. The couple snuggled up together and Loki was left wanting.
Always wanting more.
Want, want, want- That's all Loki seemed to boil down to- a want that was so powerful it bordered on being a need.
Loki could hear the couple behind him whisper softly to each other. He tugged at his own hair, pulling it to his limit.
He was painfully hard, curled up into the fetal position, forehead on his knees. He pulled his legs in tighter, just trying to relieve some of the ache.
A calloused hand touched his hands and Loki automatically loosened his grip. Tony ran his fingers through Loki's hair, soothing the ache to his scalp.
It wasn't enough, and Loki just wanted more.
"Relax, just rest." He guided Loki's head so that it was resting against Tony's thigh. It was slightly uncomfortable, but somehow Loki fell asleep just moments later.