In the calm afternoon, Lincoln is making out with Ronnie Anne in his bedroom, on his bed. As they are kissing and licking each other's tongue, Lincoln is 'massaging' Ronnie Anne's chest while Ronnie Anne currently grabbing Lincoln's crotch.

Lincoln: "(Thinking while cupping Ronnie Anne's breasts)She does have big boobs for her age. I wish I can see them with my own eyes."

RA: "(Surprised with Lincoln cupping her breasts then slaps him in the face)WHAT ARE TRYING TO DO LAME-O!"

Lincoln: "Ouch! What was that for? I mean it's normal for a guy to massage the girl's breasts when he is making out? By the way you still grabbing my crotch(points at his crotch where Ronnie Anne still grabbing it)."

RA: "(Blushes)That was not intentional."

Lincoln: "Now that we officially a couple now why don't we take off each other's clothes so that we can know each other better? Can you let me see those awesome tits of yours, please?

RA: "(Shrugs and facing away)No way! Not until you show yours first."

Lincoln: "(Sighed)Fine, I'll show you my cock anyway..."

Lincoln's upzips his pants, revealing his small, flaccid penis. Ronnie Anne obviously not impressed to see it.

Lincoln: "See, I know you not going to like it...(Shrugs).

RA: "(Enrages and clenches fist)You're not even erected when we are together. Either you are fantasizing someone else or I'm not sexy enough for you. (Shouts angrily)NOW DIE!(Punches Lincoln's balls)

Lincoln: "(Screams in pain)OUCH! WHAT WAS THAT FOR!"

RA: "(Angrily)OUR RELATIONSHIP IS FINALLY OVER, LAME-O. I'M GOING TO TELL MY BROTHER TO STOP DATING YOUR SISTER!"

Ronnie Anne angrily leaves Lincoln's bedroom and steps outside the Loud House while Lincoln tries to catch up with her.

Lincoln: "(Pleading in tears)Ronnie Anne, please don't go..."

Lincoln dropped on his knees, crying and all his siblings to see what's wrong.

Luna: "What's the matter luv, I thought you're going to get laid with Ronnie Anne today."

Leni: "Linky's all sad. So am I."

Lincoln: "Ronnie Anne is breaking up with me. She tells that my penis isn't big enough for her."

Lynn: "Breaking up is bad but breaking up because of your penis length is too far, even for her(clenches her fist).

Lola: "(With fire in her eyes)THAT SANTIAGO BITCH IS GOING TO PAY FOR MAKING LINKY CRY!"

Lincoln: "...And she threatened to tell Bobby to break with you, Lori."

Lori: "(Surprised)Wait, she wants Bobby to literally break up with me? This is literally beyond unforgivable."

Lisa: "Worry not, brother. We already have a solution for your rather tiny genitalia."

Lucy: "As long as you agree with our terms."

Lincoln: "Wait, what that supposed to mean?(Scratches head)"

Lisa: "We can enlarge your genitalia which impresses your romantic interest but there's a side effect, the size upgrade will be permanent and it cannot be reversed."

Lucy: "I already practiced on countless of male cadavers that Lisa provided and they all got erection but I never did it on living one."

Luan: "Talk about eternal boner..."

All other siblings groaned at Luan's 'joke'.

Luan: "That was not a joke."

Lisa: "Now that you agreed with our terms, we shouldn't waste our time here. Siblings, let's go to the backyard and see the contraption yourself."

They all followed Lisa to the backyard of their house and see a massive machine with lightning rod on top.

All Loud siblings except Lucy, Lana and Lisa: (Astonished)Whoa!

Lily: "(Amazed)Poo poo."

Lincoln: "That an impressive machine Lisa but how can it help me to enlarge my cock?"

Lisa: "You'll see for yourself.(To Lana)Lana, I want you to check on the machine."

Lana: "I'm on my way."

Lana make some last-minute inspection and less than a minute later she gives a thumbs up.

Lana: "(Thumbs up to Lisa)She's ready to go. Thanks for these oil-stained coal-flavored cookies(eats her cookies).

All other siblings except Lincoln and Lisa: "(With disgust)EWWW!"

Lincoln: "Well, that was the least disgusting thing she ever eat."

Lisa: "Step inside brother but you need to remove all your articles of clothing first."

Lincoln: "(Surprised)What! You want me to get inside that machine naked!?"

Lisa nods and Lincoln reluctantly take his clothes one by one until he is completely naked. All his sisters tried not to laugh at his rather tiny flaccid penis. Then he walks into the machine and Lisa closes the door, leaving him in the dark compartment of the machine. It was so dark that he couldn't see anything inside.

Lisa: "Lucy, now it's time for you to play your part."

As commanded by Lisa, Lucy read a spell from her book and suddenly some dark clouds start forming over the Loud House and then a lightning bolt strikes the machine's lightning rod. Now in full power the machine is alive with activities and all its LED went on and off randomly.

Lincoln: "What just happened outside? My body's start to feel funny."

Lisa: "Worry not, brother. This is part of the procedure. Stay silent until it finishes."

Few minutes later the machine produces thick white smoke that engulf the entire backyard. When it subsidizes, the machine's door opens and Lincoln walks away from the machine without noticing the changes made to his body.

Lincoln: "(Staggered)My head feels heavy and rest of my body doesn't feel so well..."

Lisa: "You need to check your genital now, brother."

Lincoln look downward to his crotch and surprised to see his once tiny penis now grown almost a foot long. His testicles are also grown at impressive size.

Luna: "That is impressive love stick you have, bro."

Lola: "Wow! You have such lovely, huge cock."

Lynn: "That's even bigger than my baseball bat."

Lana: "I hope he pee a lot with that."

Luan: "Lincoln had to drag his log and nuts around."

Everyone except Luan groans at her pun.

Leni: "Totes awesome. Love you Linky(fly some kisses at Lincoln)

Lisa: "Siblings, it still too soon for us to celebrate. Our brother need to put his newly-formed sexual organs to practical work, by having sex of course.

Lincoln: "(Puzzled and scratches his head)I don't think that is a good idea. Ronnie Anne still furious with me and even with this new cock."

Lisa: "That should not be a problem, brother. I can call some 'volunteers' from downtown, especially those who works in the streets."

Lori: "(Raises her hand)No need to that, Lisa. I literally volunteered myself for this experiment."

Lisa: "Good and everyone follow me to Lori and Leni's room for the next phase of our project."

In Lori and Leni's room, Lincoln lie down on Lori's bed while Lori massaging his penis. Slowly his penis start to rise and increases in size.

Lisa: "As you can see here Lori is performing a stimulation on Lincoln's cock. This act known to most people as a 'handjob'."

Lisa describing Lori's sex act on Lincoln to her siblings.

Lisa: "It looks like Lincoln's cock may not going to grow any bigger even with the massage. Lori, I recommend you to take off your shirt and bra and provide him with some visual stimulation with your breasts."

Lori took off her blue tank top and her bra and tossed them on the bedside. Lincoln's penis grow significantly as he saw his sister's breasts for the first time. Most other sisters also impressed with Lori's breasts as well, cannot take their eyes off them.

Luna: "Man, look at those massive mams..."

Luan: "So she brought out her little friends which are not-so little"

Lola: "They say those are pride of a woman. I can't wait to have those myself."

Lana: "(licks her lips)Those look delicious..."

Lisa: "Looks like Lori is going to put those big breasts of hers for a good use. She decided to put Lincoln's cock between her breasts to give further stimulation. This act also known as 'titjob' or 'titfuck' or 'boobjob' depends on your preference."

Lori: "(Tightens her breasts around Lincoln's penis)This is just a beginning, twerp. The good part is yet to come(start to move her breasts up and down).

Lincoln: "(Moans in ecstasy)Aahhh!"

Lori: "(Chuckles)You're not prepare for this(licks Lincoln's glans and foreskin)!"

Lincoln moans even harder. His penis now at maximum size.

Lisa: "Looks like the best part is about to start. Lori will suck Lincoln's cock, using her mouth to stimulate her brother's cock. This is called as 'blowjob'.

Lori start swallowing Lincoln's penis and after nearly two third of Lincoln's penis in her mouth, it reached her throat which is the farthest he can go. Lincoln hold his sister's head and start thrusting his penis back and forth. Lori provided stimulation with her tongue inside.

Lisa: "Finally it happens. Lincoln thrusting his cock inside Lori's mouth as if that were her pussy. The squeezing action in Lori's mouth is quite similar her pussy and at this moment Lincoln's cock might produce Cowper's fluid or street name 'precum'."

Lincoln moans even harder and thrusting faster than before. Lori know that any moment her brother could explode in her mouth.

Lori: "(Thinking)Looks like Lincoln is about to blow. I don't mind swallowing his cum as I already swallowed Bobby's for countless time. Hurry up Lincoln, feed your big sister much needed sperm. I won't lose a drop."

Lisa: "Sisters, Lincoln is about to blow. He decided to ejaculate into Lori's mouth as she agreed."

Lincoln: "Here it comes, Lori. Hold tight and take my cum.(Ejaculating)ARGHHH!"

Lincoln's penis explodes in Lori's mouth and torrents of semen flooding into her throat, forces her to swallow some of it while the rest stay in her mouth cavity. Eventually Lincoln stops ejaculating and carefully removes his penis from Lori's mouth, who still hold of his semen. Lincoln lies down on the bed, exhausted while Lori still wondering on what to do with rest of her brother's semen.

Lori: "(Thinking)This isn't taste like cum at all. In fact it literally the tastiest thing I ever. Time to swallow rest of his cum."

Lincoln's semen didn't taste like semen at all. Its sweet and tasty as if it were liquid candy. Lori swallows Lincoln's semen with one big gulp.

Lisa: "It looks like Lori decided to swallow Lincoln's semen instead of spitting it out, just like any properly behaved females.

Lori: "(Swallowing and then burps)That's literally one of the best cum I ever tasted. Thanks Lincoln for your cum (rubs her belly).

Lynn: "That's unfair. She got all that protein-rich cum for herself."

Lisa: "Don't worry, Lynn. Your turn will come someday. For today let our brother rest and recover his energy."

Lincoln: "You heard her Lynn, I'm tired now and give me a break."

Lynn: "Fine but at my turn I will drain Lincoln's balls and fill my belly with nothing but his spunk."

Lori: "(Giggles and taking off her wet cargo shorts and panties)There's literally more to come twerp. Now that I'm literally horny and time for you to take me for a ride."

Lincoln: "Sorry Lori. I'm all exhausted now. I can't have sex with you today."

Lisa: "Unfortunately for you eldest sister, our brother is right. He need to rest and now his penis is flaccid, no longer able for any further sexual activities."

Leni: "But Linky had some cum left in his cock right?"

Lincoln: "What are you doing Leni?!"

Leni sucks the remaining semen from Lincoln's penis and finds out its tasty.

Leni: "That was totes tasty. Can you give me more?"

Lincoln: "Sorry I can't but in your turn I will empty my balls for you."

Leni: "(Jumps in happiness)YAY! Linky will give me more of his tasty cum."

Lisa: "I think this it for today's experiment. Lori and Leni will stay here while I will escort our brother to his room. The rest can go back to your rooms. Why not give our brother's penis some celebratory kisses?"

Eventually all Lincoln's sisters including Lily kisses Lincoln's penis at least once. After that Lincoln gets up and make his way to his room with Lisa.

Lisa: "Before you sleep there is one thing I need to tell you."

Lincoln: "Yeah and what is it?"

Lisa: "That machine did more than just enlarge your genital. It also allows you to change the taste of your semen by just thinking about it."

Lincoln: "No wonder why Lori find my cum taste sweet. I can't stop thinking for my cum to taste sweet for her."

Lisa: "That just one of the special sexual ability. You will get more if you willing to assist me next time."

Lincoln: "Thanks Lisa for my new cock. I can't wait for Ronnie Anne to see it tomorrow."

Lisa: "Good night brother. This is the only beginning."

Lisa left Lincoln's room and Lincoln start to sleep but before he closes his eyes, he give his penis a few strokes.

Lincoln: "(Stroking his penis)You done well today, Mr. Dick. An adventure awaits us tomorrow morning."