Disclaimer: I do not own anything of The Big Bang Theory. Chuck Lorre owns it. This is for entertainment and fanfiction purposes only.

Author's Note: A what if story about Leonard giving his sperm to Zack and Marissa so they could have a baby. I hope all of you like this story, and please review! :)

When the chemistry teacher, Mr. Pasternak, passed everyone's test, fifteen year old Abby Johnson, looked at hers to see the grade.

A hundred percent. Figures. She thought not being too surprised. She already predicted her grade score before the teacher passed the tests out.

Abby had an outstanding IQ for someone her age. It was above 170. She knew she was the smartest one in her grade.

Other than the Korean boy named Jackson Kang. They've been academic rivals ever since middle school.

She wondered how well her student did. Not technically her student, but he might as well be. Tyler Marshall was one of the kids she had tutored. He needed more than her to get help, maybe like a miracle. Tyler was ineligible to play football until he got good grades because he was failing miserably. So, Mr. Pasternak let Abby tutor him. It was a difficult task, but she had managed. She hoped that he did well.

He told me we could hang out more. Abby remembered excitedly in her mind.

Even though Tyler may not be smart like herself or even like Jackson, he was so incredibly handsome. One of the hottest boys the high school had to offer.

After the bell rang rang, class was over. Abby quickly went to Tyler to see how his test was. She didn't approach to him too quickly so she wouldn't look too obsessed with him, but with a casual speed to look like she was acting normal in front of him.

"Hey," Abby greeted him in the hallway.

"Hey." Tyler said being a bit down.

Abby didn't want to assume the worst.

"So, what did you get on your test?" She asked with interest.

He handed her his test with disappointment, but when she saw the grade, she was utterly surprised, and looked at him. His face was now happily grinning. He was obviously just pretending to be sad with her before.

"Look at that! An eighty percent! It's good enough for me. I never got a grade like that before."

"This is great, Tyler!" Before Abby could stop herself, she hugged him.

Fortunately, he had hugged her back, too.

She let herself relax and embrace in his warm and strong arms. The feeling of her body against his broad and muscular chest. She inhaled his musky cologne.

"Uh, Abby? You can let go of me now." Tyler said uncomfortably.

Abby's eyes widened in horror, and she backed off of him instantly. She just made the contact awkward and uncomfortable. Great. She was such a loser.

"So," Abby said, unsure of how to continue talking. "Uhhh...when are we going to hang out?"

"Huh?" Tyler said stupidly until he remembered. "Oh, uh, right," He nervously scratched the back of his head, and his blue eyes nervously looked at anywhere besides her. "Uh, I'm getting kinda busy. With my grades improving and I'm getting back on the team, we won't have much time to spend together."

Abby's heart deflated. It soared into the air when they hugged, but suddenly it crashed against a brick wall, and shattered into pieces.

"Oh..." To say that Abby was disappointed was a major understatement.

It looked like Tyler briefly felt guilty. "You understand, don't you?"

Abby snapped herself out of it. Of course, she did. It was Tyler Marshall. He wouldn't want to hang out with a nerd like her.

"Yeah, totally." She tried to sound cool about it instead she felt dead inside.

That moment of guilt was gone from Tyler face, and he went back to his easy going self.

"Okay, cool," He beamed. "Thanks for your help, Johnson. See you later?"

Tyler walked away to his friends where they were in a group.

Abby sadly sighed as she went to her own locker. She banged her head against it a few times.

"You're going to lose some brain cells when you do that, you know." It was one of her best and only friends, Chloe Hartley. She had red hair, blue eyes, and was a couple of inches taller than Abby. She always felt short compared to Shannon.

"I could lose a few so I won't be such a nerd." Abby muttered.

"What's wrong, Abs?" Chloe asked with concern. "I know you couldn't have failed the chemistry test."

Abby turned around to face Chloe, and leaned against her locker. "I didn't. I passed it. Got a hundred."

"Not surprised."

"It's about Tyler. He said we could hang out before, but now we're not going to anymore..."

"Typical," Chloe rolled her blue eyes. "He was obviously just using you, Abby."

Abby thought about it.

They have been studying and working together. They got along well with each other. Abby was stupid enough to believe they could've been friends, and maybe something more someday. Now, that Tyler was getting good grades, he suddenly didn't need her anymore. He got what he wanted out of her.

"You're right. I'm so stupid!"

"You're smart enough to finally realize that, huh?" Alyssa Montgomery teased her. She was with her group of snotty friends that Abby had always hated.

Alyssa was the most beautiful girl with dirty blonde hair except with green eyes not blue. Abby felt ugly compared to her because of her long, curly brown hair and brown eyes. Only her friends knew she wore contacts; she wouldn't be caught dead wearing glasses. It'll make her look like a bigger nerd than she already was.

Alyssa was one of Abby's enemies, and they've always hated each other. Abby never understood why Alyssa was mean to her for no reason. To be honest, she was jealous of Alyssa because of her popularity and beauty. She knew it was stupid to be jealous of those vain and superficial things, but she couldn't help it.

"Shut up, Alyssa!" Chloe snapped, but she had ignored her.

"You won't ever have a chance with Tyler. Besides, he goes for the easy girls."

"Like yourself?" She retorted.

"If I can't even get him then no one can," Alyssa narrowed her green eyes at her then looked at Abby. "Tyler's not into nerds like you anyway. So, don't even try, Johnson."

Then she and her friends walked away from them.

"She's so annoying," Chloe muttered. "Thinks she runs the place. Don't listen to her, Abby. You're not a nerd. You're the smartest person in this entire school. She was most likely jealous of you because Tyler's attention was on you for a while. But seriously though, you had to have known that he was a player."

"That's true. Why did I ever thought I had a chance with him?" Abby asked. She shook her head at her pathetic wishful thinking.

"Don't worry. You're not the only one."

Abby had mentally made a promise to herself that she'll never fall for hot and dumb guys ever again.

After school was over, her mother, Marissa, would usually pick her up from work. She really didn't have to work because their family was rich thanks to her father, Zack, and the menu designing company he had. But her mother had wanted to get a job once Abby grew older. Marissa said once it got boring and quiet at the house when Abby was away at school or with her best friend. Her father was still retired.

"Hey, honey, how was school today?" Her mother always brightly asked her.

Abby shrugged. "It was fine."

"How was your test?"

"Fine. I got a hundred percent on it."

Her mother grinned. "Of course you did! My little girl is such a genius!" She praised which made Abby felt a little bit better from being a dork and a nerd.

She didn't want to brag, but it was true that Abby was the smartest one in the family. Not only at school. She figured she may have inherited the intelligence from other family members down the line. It could be possible. She hadn't meant that her parents were stupid, but they're not on the same intellectual level as her.

Sometimes, Abby would have to help her parents out with the most simplest tasks. Like always reminding them about their appointments, and wrote it down for them. She told her mother where to find her lost items if she didn't remember. She'd tell her father to bend his head down to not accidentally hit it on the ceiling if he was too tall in a room or going downstairs.

It sometimes exhausted her to keep up with them, but Abby still did it anyway because they obviously needed her, and she loved her parents a lot.

"So, dinner is up to you tonight!" Her mother was still smiling, a bit too happy for Abby's taste.

"Really?" Abby asked. It was only rare that would happen, especially on a weekday.

"Yeah," She nodded. "You can pick anywhere you want to eat. Your choice."

Abby saw right through her mother's odd behavior, and knew something was up.

"What's going on here? Are you alright?" She asked suspiciously.

"Yeah, of course I am, sweetie. Why wouldn't I be?" Her mother's smiled wavered a little, and she mostly avoided her daughter's eyes. That's when Abby could sense something was off.

"It's a Wednesday, and we usually don't go out to eat on weekdays. Also, your smile is freaking me out a lot. You look like the Joker."

That's when her mother finally caved in. Her smile fell, and her face was serious.

"Okay, I can no longer lie to you," She sighed in defeat. "We are taking you out for a reason."

"What reason would that be?" Abby asked curiously.

"I promise your Dad that we'd tell you together."

Abby racked through her brain wondering what it could be. It sounded like it was something majorly important and serious.

"Did someone die?"

She chuckled a little. "No, it's nothing like that. It's just...between the three of us."

What could it be that it was them as a family?

Abby knew her mother couldn't get pregnant because her father was infertile. He told her the reason why before. At least, maybe why he was infertile. It was a disturbing and gross story. She kind of hoped it would be a vacation, but they were still in the middle of the school year; they wouldn't do that. Were they moving to a new house? If so, that wouldn't be too serious.

She tried to think of so many things, but couldn't come up with anything.

After about twenty minutes later, they arrived home. Zack turned off the television when he saw Marissa and their teenaged daughter entering the house.

"Hey, kiddo." He greeted Abigail, ruffling the top of her brown hair.

She gave him a look as she smoothed out her hair. "You know I hate it when you do that."

He smiled in amusement. "I know. That's why I do it."

She rolled her eyes.

"How's school?"

"Fine. Nothing special. I've passed my test today."

"Not surprised. We raised you to be a genius. Maybe a scientist someday."

"Just because I like math and science doesn't mean I might be a scientist." Abby replied.

She felt like she said that a hundred times before. For some reason, her parents wanted her to become a scientist. They had a particular field in mind like maybe a physicist or even a neurobiologist. But there was no way she would see or inspect the insides of a brain. She could barely handle to watch horror movies with the blood splattered everywhere including the body parts. Being a doctor was completely out of her career choices.

Abby was mostly interested in being a graphic designer, or maybe some other career. It always changes.

"We know, honey, but you never know when you could change your mind." Marissa said.

They've had the same conversation before, so Abby hadn't felt like to repeat it.

"Where do you want to eat for dinner?" Zack asked her. "You know it's your choice, right?"

"Yeah, I know. Ummm...how about the Olive Garden?" Abby suggested.

"Sounds great!"

"Perfect!"

Her parents said simultaneously.

It was only after Abby finished her homework, they went out to the restaurant. When their waiter served their drinks to them, and they gave him their orders, Abby's parents was about to tell her the news.

"What's this all about?" She wondered being way too curious. "Is everything okay?"

"You are too smart for your own good." Zack said.

"Honey, we'd like to tell you something, but we want you to know this has absolutely no reflection on you." Marissa told her comfortingly as if she was a small child.

How her mother started made Abby worry.

"We're getting a divorce." Zack announced.

Well, that was something Abby had never expected.