Sheldon's life was all about routines and order. Indulging his body with Penny was no different. He made her part of his schedule.

Every Tuesday, after Leonard had gone to sleep, he would send for her. He would sit on the edge of his bed and wait for her to show up. It might have been simpler to be undressed and ready when she arrived, but he liked watching her remove his clothes.

Every other Friday he would wait for Howard, Leonard and Raj to go out clubbing before making his way across the hall to her. He would have gone every Friday, but she worked alternating shifts on the weekends. If she worked the evening shift on Friday, she worked the afternoon shift on Saturday and she would join him for laundry night. Laundry night was not a fellatio night. On those evenings she would perch on a dryer, and he would move between her legs. Penny would use her hand to pleasure him as he rested his head on her chest.

Last weekend he had been unable to resist placing his hand on her breast. She had jerked back at first in surprise, but she made no real objection. She had replaced his hand on her as she went back to touching him. He wondered how she would react if he tried to kiss her breast. She had made absolutely no requests for reciprocity. She never displayed any affection other than her normal friendliness. She never acted any different except in the privacy of his bedroom.

On Tuesday he had rested his hand on her shoulder as she knelt between his legs. He had timidly slid it down her arm to her side and under her shirt. Penny had lightly pressed her breast against his palm, but made no other indication she noticed. She let him do as he pleased, giving him total control.

It was the perfect arrangement. So why was he beginning to feel discontent? As if he was missing something? It would be their 11th week tonight. Eleven weeks of pleasure and satisfaction at Penny's hands. Or mouth as the case may be. He stared at the phone in his hands , but could not bring himself to hit the send button. He wanted her, beyond a doubt. His body was aroused, almost painfully so. Yet he could not send for her. He wanted more. More than release. More than a session of fellatio. He wanted to kiss her, and touch her. He wanted to know what it was like to be inside her. To have her underneath him.

Sheldon leaned back against his headboard and put his phone on the bedside table. He shoved his hand into his underwear and gripped his penis. He pumped his hand and brought himself off as soon as possible. He cleaned up quickly, slightly ashamed of himself. He knew he would not be able to sleep while hard, yet he felt uneasy. He remembered an incident from his childhood. He was forced to participate in a health class activity. Everyone had to run around the school twice. He hated it, and on the second lap he had cheated by cutting through the school. This felt like that. Like he had cheated.

Saturday she worked, so he was able to avoid her easily. On Sunday he resolutely did not look at her when she joined them for dinner, even though she acted absolutely normal. On Monday he glanced at her often, but she gave no indication anything was wrong, or unusual. Tuesday she waited on them at her job just as she had always done. She chatted a bit, and smiled at them all. Once again he did not send for her. Nor did he masturbate. He still had not shaken the guilt from Friday. On Wednesday he played Halo and listened carefully until he heard her come home.

He ignored the looks from the others as he paused the game and exited the apartment. Penny glanced at him as she unlocked her door, but he just guided her inside and closed it behind him. Penny moved to the couch and took off her jacket and laid down her purse.

She watched him with concern. "Is everything okay, sweetie?"

"Are you upset that I did not text you on Friday or yesterday?" he asked.

Penny shook her head. "Of course not, Sheldon. I missed seeing you, but I am not upset."

Sheldon twisted his hands behind his back. He was not used to uncertainty. He knew others thought him arrogant or egotistical, but he was just a man who was sure of himself and let nothing stand in his way. He was not about to start now. He took a deep breath. "I am no longer satisfied with our arrangement."

He was relieved at the flash of sadness that crossed Penny's face.

Penny sighed. "You want to end it?"

Sheldon moved a step closer. "I want to adjust it."

Penny's eyes were wide. Slowly she turned to face him fully. Her expression turned soft. "What do you need, Sheldon?"

"Everything. All of it. All of you. I need more than stress relief, or an orgasm. I need to hold you. I need to kiss you. I need to bury myself in you. I need to know how it feels to have you underneath me. I need our friends to know that we are together. Not a casual arrangement. A real relationship. I need you." He laid himself bare before her and hoped she didn't turn away from him.

Penny's smile lit up her eyes. "Okay."

Sheldon grabbed her hand before she could change her mind and pulled her out of the apartment and across the hall. He dragged her past their gawking friends and down the hall. He opened his door and pulled her inside before locking the door and pressing her up against it.

He pressed his lips to her hard. After a couple of heart beats Penny moved her lips, guiding him, teaching him. He followed her lead while sliding his hands under her shirt. He cupped her breasts and pressed his erection against her. Penny's hands moved across his back and down to his hips. She pulled him tighter against her. Sheldon pulled his mouth from hers to pull her top over her head. His hands caressed and squeezed as she moved her lips down his neck to his collarbone. She nipped and licked at his pulse point making him groan.

Sheldon pulled her along as he walked backwards to the bed. His nimble left hand unzipped her skirt and pushed it down her hips while his right unfastened his plaid pants and pushed them off impatiently. He pulled her down on the bed beside him and rolled over her. He looked down into her shining eyes as he eased into her wet warmth. Penny's knees gripped his hips gently as he shuddered. His voice was low and tight.

"Penny, I don't think I can go slow," he said to her. He strained to control himself but his body refused to heed him. With the urgency of a virgin he began to plunge into her.

Penny reached up and wrapped her arms around his back. "Then don't," she said tenderly. "We can go slow the next time." Sheldon kissed her deeply as he released his tentative control and surged toward orgasm.

Leonard jealously stomped around for a couple of weeks. Howard and Raj teased him every chance they got. None of it mattered though. He had Penny. Besides, if they stressed him out too much, Penny had the perfect solution. And if, on occasion, he wasn't quite as stressed as he pretended, well, Penny was more than happy to play along.