Next day, Lincoln woke up and headed to the bathroom, with a not-so-enthusiastic mood to boot. "Another day, another visit to the bathroom I'll have to share with one of my sisters," he said out loud, just as he heard a relaxing, if fast paced, acoustic sound echo across the hallways. "Huh? Where's that sound coming from?"

"Yo bro!"

The boy turned to the place he heard the voice and saw it was the most levelheaded-to an extent-of his sisters, Luna, who was calling him. She was currently leaning against a wall, playing her acoustic guitar to the tune echoing in the hallway.

"Luna, why are you playing your acoustic guitar?" Lincoln inquired as he walked to the rockstar. "I'd expect you to use your electric one instead."

"Just setting up a relaxing mood, I guess. Listen, Lori and Leni told me about how you helped them relieve some stress at the bath, in the mental sort of way, so I was wondering if you would like to go to the bathroom downstairs with me?" Luna explained, crossing her arms. "I mean, if you could help both Lori and Leni, then it has to be something I have to see for myself."

"I guess we could go there, but why do we have to go to the bathroom downstairs?" Lincoln inquired.

"Because, going by what I heard, Lisa and dad are currently inside the other bathroom," Luna answered, rolling her eyes. "So, what do you say?"

The boy nodded and allowed Luna to take the lead, while the sounds inside the bathroom suddenly went quiet. And inside there, Lisa-with no sight of Mr. Loud inside-set up a staircase to get into the vent, all while she had some... Unpleasant thoughts in her mind.

"How cute, she literally needs assistance in the bathroom!"

"And to think someone as fabulous as me is related to a helpless little child like you."

"Geez, to think my tutor needs my help reaching the sink. Isn't it your job to help me, sis?"

Once the staircase was ready, Lisa climbed up into the vent and crawled her way to the bathroom downstairs while sporting a smirk and thinking:

"It's my job to help you, yes. And I'm going to help you see why you don't tease a genius!"

Back with Lincoln and Luna, the boy asked alongside the way, "Come to think of it, what is Lisa doing with dad in the bathroom?"

"You know she's pretty small, what with being four years old and all, so she needs somebody to help her reach the sink, among other things," the rocker explained. "So, she commonly goes into the bathroom with either mom, dad, or one of our siblings."

Needless to say, the boy found that little revelation... Interesting. But he had other things to think about, so he and Luna went to the bathroom downstairs and while Lincoln took off his clothes, Luna simply grabbed a purple toothbrush. Weirdly enough, she wasn't really surprised when she saw Lincoln undressing.

"Uh, Lincoln, what are you doing?" Luna asked, raising an eyebrow.

"I'm getting ready to take a bath, isn't that what we were going to do?" the boy answered with a shrug. "And shouldn't you be more, I don't know, surprised at the fact I'm casually stripping next to you?"

"Listen, Love, when you were a baby, I was among the girls who were left in charge of changing your diapers, so for every diaper I changed, I always got to see your litle elephant," the rockstar answered, and in that moment, Lincoln turned red as a tomato and put his clothes back on as quickly as he could. "So you could essentially go nudist and flaunt your thing all you want, and you wouldn't get a reaction out of me. No, I was just thinking we could brush our teeth together."

The boy rolled his eyes, took the remaining toothbrush, and started to brush his teeth alongside Luna. "So, Lincoln..." the rocker suddenly asked. "How does it feel to share the bathroom with your sister?"

"If you mean in general, it's a new thing that I find uncomfortable, but if you mean compared to Lori and Leni, then this is definitely the less awkward option," the boy answered.

"Good... Please do me a favor, and never share the bath with Lola."

Inevitably, this caught the boy's interest. "Why?"

Luna looked around, then closed the door before she leaned closer to Linc's ear and whispered, "Listen, last week, while you and Clyde were camping in the wild or getting him married or whatever, Lola and Lana shared the bathroom and brushed their teeth. However, while Lana picked her toothbrush, Lola picked Lana's spare toothbrush, and it wasn't until after Lana pointed it out, long after she brushed her teeth with it, that she realized this."

"Man, that must've been harsh," Lincoln remarked.

"And it gets worse," the rocker added. "The very next day, Lola trapped Lana in the bathroom, and then she forcefully cleaned her teeth using her own toothbrush! Lana pleaded and begged for her teeth's life, but Lola just continued to clean her teeth while laughing like a maniac! By the time she finished, Lana was left traumatized and broken. She did manage to recover, but she's become more wary of toothbrushes ever since the incident."

"Good lord," the boy said, before noticing something odd. "Wait, how do you know that happened?"

"Do you really think such an event would be quiet, specially concerning two of our sisters?" Luna argued. "Point is, I don't want you to suffer what Lana suffered, so whatever you do, don't share the bath with Lola."

Lincoln nodded, and as Luna kissed his forehead and left the room, the boy looked back at his toothbrush in contemplation... While Lisa, again in the vents, had heard everything.

"So, Lola struck again, huh? Looks like I must update my plan." she thought with a malicious smile.