A/N: Been a while since I did something small and fluffy. Let's change that.

So lately I've had the urge to write something for Lisa and Lily, and thought up of an idea for Lily being on a playdate and Lisa accidently messing it up. But then I thought of something even better.

Enjoy.

"LISA MARIE LOUD!"

The young scientist gulped. Her mother often scolded her for doing something exceptionally dangerous with her equipment, but she was never was in the mood for extreme anger. But whenever Rita used her full name, Lisa knew that she was in trouble…

"Y-yes, maternal unit?"

"Don't you 'maternal unit' me," her mother responded, her arms on her hips in a display of displeasure, "What were you thinking, having a deadly robot go wild in your room? Especially while Lily was on a playdate with another baby…"

Lisa looked over to her father, who had not joined in on the scolding, due to his current occupation of calming down the screaming Loud baby. Lily cried and squirmed in his arms, as her father did her best to rock the baby and reassure her, to no avail. Lily's face was going red from the sheer volume of her crying.

This, more than Rita's reprimanding, made Lisa feel guilty for what she did. Despite what many perceived as a scientific coldness about her, Lisa truly did care for all of her family members, Lily especially. She was her roommate, her confidant and, most of all, her only younger sister…

So causing the baby any distress brought Lisa feelings of remorse.

"I apologize, Mother. I had misread the blueprints I had laid out for constructing the automation, and the situation got out of hand, which I take full responsibility for," Lisa responded calmly and maturely.

Of course, I was the only one who did anything to shut down the violent machine, while you and father hid in your room, Lisa thought to herself, but she felt that voicing that thought was not the best action to take right now.

Rita sighed and let her arms relax a little, "Lisa, we're not mad that you enjoy science or inventing. We really do encourage you to go that route. Lord knows we need more smarts in this house," she said as Lynn and Lana rushed by on all fours, "but what you did today was very irresponsible, and we're going to think for a long time about your punishment."

"I understand," Lisa responded, hanging her head lower. Truth is, even if her parents didn't plan of punishing her, she probably would have punished herself for abandoning her basic lab safety protocols.

Suddenly, Lisa heard the sound of crying begin to wane. The girl looked up from the ground to see that her father had successfully calmed down her younger sister. Lynn Sr. was gently rocking his infant daughter, and the baby responded with light laughs and giggles. Despite her situation, Lisa smiled at the sight.

Her father then carefully placed Lily into her crib, and gave her the teddy bear she adored so much. The baby began to play with her toy bear, a sight that effectively melted everyone's hearts.

"Awww," went Rita, before snapping out of her cute-daze, "Come on, Lynn, let's go decide Lisa's punishment."

"Can't I watch Lily a little longer?" her husband asked, to which he got his answer when Rita pulled him out of their room by his ear.

Lisa walked over to the baby's crib. Whatever her parents were going to come up with, it didn't change the fact that she wanted atonement from the one she wronged.

"Well, dear younger sibling, I would like to formally apologize for my unprofessional behavior today, as well as for chasing away the infant that our parents had designated as a 'play-mate' for you. I do hope you will find it in your heart to forgive me for my transgressions," Lisa said. The baby stared blankly back at her, before blowing a raspberry and bursting into her own amused giggles.

"I-I suppose that is an appropriate reaction from you," Lisa said with a bit of a smile. Her amusement faded, however, as she continued to watch her baby sister play with the teddy bear. Lily may have been enjoying herself, but Lisa knew that Lily should have been spending her time with another human being, a fellow baby that could build the necessary social skills Lily would need to survive in this world…

"The kind of social skills I had a hard time developing," Lisa remarked quietly to herself.

Now, her resolve was steeled. The girl's eyes flashed with a light of confidence, and she raised herself in a poise of self-assurance. Lisa knew what she had to do.

"I promise you this, Lily, I will fix my mistakes by searching and scouring all of Royal Woods for a fellow child to partake with you an extended period of casual activity and social merriment. Street name; playtime," Lisa said with bravado.

The baby responded to her sister's declaration with a small "Poo-poo?" Lisa was confused to what the girl was asking until the awful smell hit her nostrils.

"Oh lord, it's suffocating," she gagged, "But you can't have a playdate on a dirty diaper, so… let's get you changed, dear sister…" Lisa said with hesitation as the baby clapped her hands…

"Good afternoon, Mrs. Thomasson. I am aware that you are currently the mother of two twin infants, and my question is whether you would be interested in having one or both of your twin daughters attend a playdate with my sister?" Lisa asked into the phone, "Who am I, you ask. Oh that's not important… I'm sure you've never heard of us… My name may or may not be Lisa Loud… Great, she hung up," Lisa said with a sigh as she put down the phone. Five phone calls, five rejections.

Geez, you let loose a school of flying piranhas one time…

"Well, Lily, I'm afraid that I have failed you. I couldn't provide an appropriate playmate for you. I truly do apologize for my failures," Lisa said as she hung her head low.

"Poo-poo," she heard her sister say. She raised her head to see Lily pointing at her. "Poo-poo," the girl repeated, obviously trying to communicate something to Lisa.

"What are you trying to tell me?" Lisa said as she rubbed her chin, trying to decipher which of the baby's many usages of the term 'poo-poo' she meant in this scenario.

Suddenly, she felt she understood what the baby was trying to imply.

"I see your point, Lily. How could I have been so blind?" Lisa said as she smacked herself on the forehead, "I forgot who I was for a second; I'm Lisa Loud. I don't need to call you a playmate; I can just build one for you."

"P… poo-poo?" Lily asked in confusion.

"Yes, yes, I can see it now. I can build robots for destruction and weaponized usage; why not build a robot with the ability to provide entertainment for a baby? Oh mama, the things I could make it do. I'll give it a music box, and utensils for cutting up nutritious fruits, and the ability to solve any children's puzzle and… and…"

It was clear the scientist was enjoying herself a bit too much.

"My gratitude for the idea, Lily. Now I need to go to my bunker lab and get to work there. I'll assume Mom and Dad will be even more displeased with me if I work with robots around you again," Lisa said as she let from her bed and ran out of the room, "Just give me a little while, Lily. I'll be back with the best playmate you've ever seen."

"Poo-poo," Lily said forlornly, slumping over slightly. She turned back to her teddy bear, and gave it a little kick. The toy was unresponsive as Lily gazed back to the doorway her sister left from...