AN: This is just some bonus material I had bouncing around in the back of my head. It's self-contained and doesn't really correspond to any current or planned story events.

darkkrt: To be honest, I'm still on the fence about whether I should/should do anything else with this. This really was just supposed to be a quick thing based off an animation I liked. And then I spot-welded some stuff from another fic that was tertiarily related, and now it's basically become a whole other thing. So I need to reexamine what, if anything I can do with this going forward. But I'm really happy to see enthusiasm like this, that kind of thing makes me want to write more, so we'll see. Though, if I did continue, I'd probably change the name of the story, because even just the one additional chapter has caused it to grow way beyond that original premise, lol.

Guest99: I don't see either of those things as being all that obvious, since even I didn't have a plan for this thing beyond that original chapter, and then "Oh hey, I'll throw Lynn into the mix." But we'll see what happens.

"So...explain this to me again," Lincoln said as he adjusted his workout clothes. "What, exactly are we doing?"

"It's simple, bro" Lynn's voice gently boomed from above him. Glancing up, he saw that his exceptionally big sister was lying on her stomach, her head resting in her hands as she watched him go about his preparations.

"Ya see, Linc," She continued. "You've already achieved the amazing accomplishment of having gotten, 'Lynn tough'. Meaning that you were able to stick things out until you could almost keep up with me. Which is a pretty big deal, since you're literally the only person who's ever managed that."

"Thanks...I think," Lincoln replied, blinking uncertainly.

"It's one of the things I love about ya," said Lynn, giving him a flirtatious wink. "The problem is that Lynn was last year's model. So now you're gonna have to get Lynnzilla tough!"

Lincoln held up one arm and began poking it experimentally. "I'm...not sure that's possible, Lynn. Like, physically possible. Last I checked, I was still made of bones and meat and stuff."

"But you're going to tryyyyyy, right Linc?" Lynn asked, lowering her face to ground level and fluttering her eyelashes at him. "For me?"

Lincoln's head drooped as he sighed in resignation. "Yes, obviously."

"Atta boy!" Lynn shouted enthusiastically, reaching down to take Lincoln's tiny fist between her fingers, and bumping it against her much larger fist. "Don't worry, Linc! I'm gonna guide you every step of the way! I'm gonna personal train the snot out of you!"

"That's what I'm afraid of," Lincoln replied, wincing as he shook his now stinging hand.

"Thirty...six!" Lincoln grunted as he pulled his head past the required height, and slowly lowered himself down again. "Thirty...sev—H-hey!"

"Just keeping your head in the game," Said Lynn, as she lowered the index finger Lincoln was still clinging onto until it was level again. "Now come on! Only sixty-four to go!"

"W-woah!" Lincoln shouted, flailing his arms in a desperate bit to keep his balance as he tried to traverse the rippling terrain before him. Unfortunately, every step he took set the ground to quaking, requiring him to take a few steps back to avoid toppling over.

"Lynn!" He shouted, shooting an annoyed glare skyward. "Come on! This was your idea!"

"S-sorry, Linc," Lynn replied, her voice quavering with barely repressed giggles. "I didn't think I'd be to ticklish down there!"

Sighing in frustration, Lincoln peered out and reassessed the rocky, rigid terrain that was Lynn's abs. Gritting his teeth, he took a standing leap, soaring past his previous position by a decent amount, and landing lightly on his feet...until his momentum caught up with him, causing him to stumble ever so slightly...and scuff his feet.

"BAAA HAHAHA!"

Knowing what was coming, Lincoln threw himself to the ground and held on for dear life as Lynn's body was wracked by a fresh wave of giggles.

"Good grief," He muttered, resigning himself to having to weather yet another storm of laughter.

"I really don't know about this one, Lynn," Lincoln said uncertainly as he clenched and unclenched his hands, which were now adorned with boxing gloves.

"It's fine, bro," Lynn reassured him. "Now go on and take a swing!"

"If you say so," Lincoln muttered, pounding his gloves together. Taking his stance, he wound back his fist just like Lynn had shown him, and sent it flying at his target, striking it dead center with a nice, meaty thump.

"Mmpf...nice," Lynn said, encouragingly. "Do it again,"

Eyeing his target, Lincoln obliged with another strike. This time, it was impossible to ignore the enticing way it bounced.

"C-come on, Linc! Really lay into it!"

Sighing in resignation, Lincoln continued on, eventually finding his rhythm as he sunk blow after blow in sequence. He glanced upward to see if any more guidance was forthcoming, but all he got was the sight of Lynn's glassy-eyed, joyful face.

"This is weird, even by my standards," Lincoln muttered as he continued wailing on his gigantic sister's boob.

Lincoln groaned in agony as he lay on the ground, so sore that he couldn't even roll onto his back. He still had enough presence of mind to feel alarmed as Lynn's titanic hand slipped underneath his prone form and began picking him up, but his body refused to react, as whatever was forthcoming couldn't possibly be worse than the pain that moving would incur.

"Lynn," He moaned weakly. "No more! Please!"

Lynn raised him up to her eye level, but to his surprise, replied by gently shushing him.

"Hey, hey," She whispered. "It's cool. You're done, now it's time for me to do my thing."

Lincoln's mind whirled as he tried to figure out what that meant, but the next thing he knew, Lynn's fingers were pressing down upon his back, and then—

CRACK

—bliss.

Letting out an involuntary shudder, Lincoln melted into Lynn's palm, his last shreds of resistance fading as a pleasant warmth began to spread throughout his body.

"You see, Linc," Said Lynn as her fingers continued to work their wizardry upon him. "The most important part of any workout is the recovery. You worked your ass off today because you wanted to make me happy. And you did, and...I love you for that. So now, you just get to lay there while I be the best girlfriend ever."

"Mmmm," Lincoln murmured, words finding it difficult to work through way through the liquid bliss that his brain had devolved into. "Love you too...Lynn. Please...don't stop…"

"Whatever you say," Lynn replied, leaning down and giving his face a gentle kiss, "Little bro,"