It was!
A couple days later Penny was at the mailbox, she was upset her Visa was cancelled, but she got a new Master Card. Sheldon came in and struck up a conversation with her. "I wasn't sure of the protocol now you and Leonard are no longer having coitus."
"God, can we please just say "no longer-seeing each other!"
"Well, we could if it was true, but you live in the same building. You see each other all the time. The variable which had changed is the coitus."
"So how have you been?"
"Well, my existence is a continuum, so I've been what I am at each point in the implied time period."
She looked at him, "You're just coitusing with me, aren't you?"
He smiled, "Buzzinga!"
"How's Leonard doing?"
"He seems all right, although he does spend a disturbing amount of time looking at photographs of you and smelling the pillow you slept on, although, now that I think of it, he asked me not to tell you that."
"I'll pretend I didn't hear it."
"You know Sheldon, I'll have you over for spaghetti some night and we can talk further."
He turned at his door, "I'm hungry now."
"Oh, um, okay, why don't you give me an hour and come over?"
He entered the apartment and Leonard was unpacking the food from take-out, "Hey, where have you been?"
"I was talking to Penny."
Howard jumped all over him telling him he shouldn't be talking with the ex-girlfriend of his roommate.
Sheldon felt bad and ate his food, but still had to fulfill his commitment with Penny, so after his meal, he told everyone he was going for a walk and headed over to her place. He was already full, but forced down the spaghetti Penny made for him.
Penny started quizzing Sheldon, "So was Leonard okay with you coming over?"
"Oh, yes. In fact her said, "I'm fine, I don't care". In no manner which would lead one to believe that he was covering up feeling of anguish or betrayal."
She raised her eyebrows, "Well, good!"
"I'm also pleased to report that he's all cried out over you."
Now she really felt bad, "He's been crying?"
He stopped eating and looked out across the room, "Oh, I believe that was something else I wasn't supposed to mention."
She put her head in her hands, "Oh, God, I feel terrible!" She was feeling bad, she knew she hurt Leonard, but right now she needed to be comforted. Dressed in a loose fitting Nebraska t-shirt and short athletic shorts and her hair pulled up in a ponytail, she stood beside the table and looked down at Sheldon, "Would you do me a favor Sweetie and give me a hug."
He stood but didn't move any closer, "If I must, come on, do what you must."
She wrapped her arms around him and pressed her lush body against his. She knew he felt something because after a few short seconds, she felt his big cock pressing against her belly. She hugged him tighter and all of a sudden she felt the urge to get busy with him. She had her head resting on his shoulder; she turned it and allowed her hot breath to tantalize his neck and ear. She smiled when she felt him shutter and felt his arms come up from his sides and begin running up and down her back. She knew he felt her bare back. She didn't bother with bra or panties after showering and getting free from her waitress uniform.
Sheldon felt a stirring in his loins and knew he should stop this from going any further. Even though Leonard and Penny were no longer an item, he felt like he'd betray Leonard if things went any further. He was just about to push back when he looked down at Penny and she looked up. Their eyes met and he was lost in those gorgeous green eyes. The next thing he knew, he was kissing her. It was gentle at first, but it grew hotter by the second.
Penny clutched at Sheldon's back as her lips parted and all of a sudden, her tongue was tracing his lips. When she felt them part, she darted in and out, fencing with his tongue. She moaned lightly when she retreated and his tongue slipped past her lips and into her mouth. She had to make a quick decision, but when she felt Sheldon's hands slip beneath her loose fitting t-shirt and started up her bare back, all was lost. She began walking him backwards and they were soon at the entrance to her bedroom.
Sheldon pulled back slightly and with one swift movement, he pulled her t-shirt off and gripping her shorts, pushed them down. He stopped and stared and Penny's beautiful, naked body standing before him, "Oh my, I now see why Leonard loved having coitus with you, oh sorry, I meant to say intercourse."
She giggled, "Why would you say that Sweetie?" She was looking for a complement, Sheldon was the wrong person to seek that out from, she was wrong."
"Well Penny, not that I'm an expert with the female anatomy, but from a laymen's prospection, your body is every pleasing to look at. Your breasts and very symmetrical, they look very firm and sit high upon your chest. Your waist is tiny, your belly is rather flat from all of the exercising you do and your hips are just wide enough, perfect for child bearing." He turned her slightly and gazed at her ass, "Oh my Penny, your buttocks is also very firm and nicely rounded. Overall you are a very luscious looking specimen of the female persuasion."
She smiled, "Well thank you Sheldon, coming from you, that really means something." She raised her arms and her full, firm tits rose and swayed. She pulled the ponytail holder free and she ran her fingers through her long blonde hair. She smiled when she heard Sheldon let out a moan and before she could react, he picked her up and planted her flat on in the middle of the bed.
He quickly removed all of his clothes and he stared down at her, "Are you sure this is okay to do Penny? I wouldn't want to force myself upon you, especially after your recent break-up with Leonard."
Her eyes locked on Sheldon's exceptionally long and stiff cock. She licked her lips and nodded, "Oh yes Sweetie, you are exactly what I need right now after the past week, I need to forget and seeing what you have, it is perfect. Now come down here and fuck me, fuck me good and hard and don't stop until you fill my pussy with your hot, creamy sperm."
He knew there should be some foreplay, especially with the sure length and girth of his penis, but he was overwhelmed with the urge to just fuck the living shit out of her, and that is exactly what he did. He gripped her strong, shaking thighs, and spreading them wide, he shoved in. He sank in and went deeper and deeper. He felt his balls resting on her lovely bubble butt and he knew he was completely in her. He held it there for several seconds. When he felt her cunt muscles twitch and squeeze down on his shaft, he pulled out slightly and shoved back in, making sure he was totally seeded in her.
Penny never felt anything like it before. She was stretched to the max and whenever he moved, he brushed her cervix, it was painful, but increased her pleasure ten-fold. She wrapped her arms around him and urged him on. She rained hot, wet kisses all along his jaw, neck and to his ear. She nibbled at his earlobe and released it when she felt him begin to pump in and out of her. She groaned out and urged him on, "Oh God Sheldon, you're magnificent, we should have done this long ago. Fuck me, fuck me good and hard! I want to feel you deep in me; I want to feel you in my throat."
He stopped and looked into her bright green yes, he smiled, "I thought you wanted me to fuck you. If you want it in your throat, that would mean slipping out of you and have you take me into your mouth." He resumed fucking her, but still wanted an answer."
She rolled her head from side to side. She wanted to answer him, but her first orgasm overtook her and she held her breath as she tensed up and came all around his invading cock. When it slowly subsided, she let out a long cleansing breath, "No Sheldon, it's just an expression, meaning to shove it so deep, it comes out into my throat, never mind, just keep doing what you're doing, just do it faster and slam into me harder, I love it hard and fast! Mmmm yes, just like that!
He smiled down and nodded, "Oh, I think I get it, but it is anatomically impossible to do that from here. So you like it hard and fast huh? Well never let it be said that Sheldon Lee Cooper doesn't accommodate his lady!" He grabbed hold of her legs and planted them firmly on his shoulders. He held her and began sliding in and out slowly and picked up the pace. Before long he was slamming into her so hard, the headboard was slamming hard against the wall. He felt and saw Penny cumming a second time. Her thick creamy juices were squirting out all around the tight seal his thick cock caused. He saw her milky cum coating his cock as he increased the pace.
Penny was beyond exhaustion, after her second orgasm, it never ceased. She just plateaued higher and higher. Her orgasm grew strong and stronger until she did what she rarely did, she begin squirting. Her slimy juices shot out and coated Sheldon's belly and chest.
Sheldon was shocked at the occurrence. He'd seen it in some of Leonard's extensive porn collection, but always thought it was fake. It triggered an explosive orgasm of his own and he began shooting his hot, thick load deep into her. He thought he was going to faint, the orgasm was that intense. He collapsed upon her slick body and found himself kissing her passionately as he slowly came down from a high he never experienced before.
After several minutes, the two of them uncoupled and on shaky legs, Penny ushered him into the shower where the two of them took a nice long, cleansing shower.
Sheldon looked to the floor of the shower, "I see you took my advice and added adhesive turtles, I have ducks on my tub floor."
"Yes Sweetie, I haven't slipped since I dislocated my shoulder, thank you for the suggestion. We getter get you cleaned up and dried off. I'd hate to have you explain to Leonard why you're in such a mess."
They dried off and he dressed and giving her a hug, planted a soft kiss on her lips, "We have to try that throat thing you talked about one of these days, buzzinga!"
She shook her head, "Oh no Sheldon, no buzzinga, we can try it whenever you want, just let me know so I can prepare my mouth and throat for that big cock of your!" She kissed him again, "Thanks again Sweetie, you are exactly what I needed tonight, now get back to your place before Leonard begins to go looking for you."
Sheldon returned to his apartment, he never felt like this before, he was calm and very serene. He said his goodnights and retired to his bedroom. He couldn't sleep and after tossing and turning he knew he had to tell Leonard about having coitus with Penny, or at least tell him, he was seeing her behind his back. He slipped into his robe and went to Leonard's room; he knocked three times, "Leonard, Leonard, Leonard!"
Leonard woke up and wasn't happy, "Oh, just come in!"
In a low voice Sheldon began; "Thank you for seeing me on such short notice."