AN: It only took me forever, but I finally finished this chapter. Sorry for that, but I promise that you won't have to wait this long for the next one.
Also first time writing SumMorty. I hope I could do this ship some justice.

Warnings: Morty/Summer, still one-sided Rick/Morty, vibrators and more voyeurism

More Rick Than You Think – Chapter 2: Incest Porn and Massaging Devices

Rick busted into Morty's room, only to find… that it was empty.
Where the heck was the boy? He had something amazing to show him and wanted someone easily impressible to admire his newest work.

If Morty wasn't with Rick or at school the boy would be at home either watching TV or be in his room masturbating or whatever else he ever did in there.
The only times that the boy, who had no friends to hang out with, would leave the house was when Rick would give him a new device that he had to invent for Morty so he could try it out outside. Having his own little adventure in the safety of home soil or something like that.

Miffed at the discovery, Rick went back down the hall intent on returning to the garage and not give any shits about Morty's absence, when he heard Summer giggling in her room.
He would have dismissed the sound and just walked past the door if it hadn't been followed by a moan that sounded suspiciously like it came from a Morty.

Rick halted in front of Summer's bedroom door, but didn't enter.
For a moment, he tried to analyze what could possibly happen inside that would produce the sounds that he had just heard.
Coming up with more scenarios that he didn't want to see – or rather ones that he actually did want to see – than ones that would be considered PG, he decided to be on the safe side and just take a peek.

Cracking the door open, silently and just enough that he could get a glimpse of what was going on in there, he could indeed spy both of his grandkids on Summer's bed.
Morty was bare, safe for his yellow t-shirt that he always wore while his big sister was still fully clothed.
Said girl was brandishing a massage stick like a queen would swing around her scepter and the smug look on her face matched the image. She then brought it to her little brother's leaking erection – just underneath the head – which drew another moan from the boy.

'What the heck, Summer? I knew that Morty was a little bastard, but you're into some crazy shit, too?' Rick thought as he took in the scurrile scene.

The redhead cackled again and let the vibrating stick trail up and down the shaft once while she focused on Morty's face. The boy was blushing furiously, his eyes screwed shut and his teeth digging into his lower lip in a sad attempt to stifle the sounds he made, but he couldn't stop a drawn-out groan from escaping him.
He released a breath as she pulled away again. Then he pouted cutely.

"Oh c'mon, Summer. Why can't you just give me your massage stick and let me go to my room?" Morty whined.

"Hey, you're the one who wants my stuff to masturbate with so you also have to play by my rules." Summer said with a grin that look almost diabolical.

Oh, so that's what was going on here.
Rick quickly deducted that Morty had asked his sister if he could borrow her massage stick or something along those lines and then she made him confess that he wanted to use it to masturbate and was now teasing him about it.
He's certainly heard stories as well as seen firsthand how the girl made her little brother do whatever she wanted and beg for certain things. It was sad and amusing to watch at the same time, but Rick had no idea how far both of the siblings were willing to go with their little quarrels.
At least it looked like Morty was really desperate about getting his sister's massaging device and Summer had no qualms about humiliating him and have him beg her for it.
Honestly, for as much as his granddaughter seemed to have struck after him, Rick hadn't thought that she would be capable of doing something like this…

"Summer! I already did this much! What more do you want from me?! Can't just hand it over?" Morty argued back now, clearly fed up with her attitude.

The redhead snorted and crossed her arms.

"You don't get to make any demands here. After all, you're the pervert who tried to sneak in here and steal this…" she motioned towards the small rod "…and do nasty stuff with it. Why should I allow you to use my stuff and have your nasties all over it? Actually I should tell mom about this!"

Morty became small again. "Don't tell her, Summer…"

"So, you see, if you don't want me to tell everyone about this, you better do what I say."

Her haughty attitude was back as the boy sighed in resignation.

"…well, w-what do you want me to do?"

She gave him a push so that he landed on his back.

"Spread your legs!" She held the stick up as a teacher would hold up a cane when they were scolding one of their students.

Very, very reluctantly, her little brother followed the order and his thighs parted. "Aw geez…"

Rick almost snorted at the display and risked giving away that he was spying on them.

'Sheesh! Why do you always have to be so pathetic, Morty?' He silently questioned his grandson.

It was really a sad sight to see the little brunet get this easily dominated by his older sister. Rick bet that he could actually do the very same thing without having any kind of incentive like the redhead had.
The boy was just always so damn compliant and submissive and easily moldable. Sure, there was the occasional moment after an intense adventure where Morty's nerves were frayed and he would bitch at him, but generally, he would follow along with everything that Rick wanted from him.
Admittedly, it made him feel powerful – not that he certainly wasn't very powerful and knew it, but it never failed to stroke his ego – and it was getting addictive. Sometimes he was scaring himself thinking about all the possible things that he could make Morty do or do to him…

He shook his head. Now wasn't the time to think about that.
So, he focused back on what was happening in his granddaughter's room.

Morty looked uncomfortable and very embarrassed as he looked up at his older sister, legs obediently splayed and his erect cock on clear display.
After she had caught him rummaging through her walk-in closet in search for the massaging device – just when he finally found it – and didn't buy his excuses, making him fess up in the end, Summer had made him take off his pants and underwear and stroke himself to hardness (which hadn't really taken long) before she turned the stick on and began to poke some of his more sensitive spots with it. Complaining about that didn't help much as she used the logic against him that this was what he actually wanted the massage stick for in the first place.

So now, he was stuck like this – in this very humiliating position – and at his sister's mercy. And if there was one thing that he knew very well about Summer, then that she didn't know mercy when it came to stuff like this.

"How much do you want it, Morty~?" She teased in a sing-song voice as she towered over him now.

His head turned an even deeper shade of red and he averted his eyes as he mumbled "…a…lot…"

"What was that? I didn't hear you?" The way she said it made it obvious that she had heard him.

Morty grumbled softly. "Please, Summer. I-I want it really bad." He said louder and clearer.

Summer's seemingly permanent grin broadened. "Where do you want it?"

The brunet growled, getting really frustrated with his sister's game. "Why do yo—AAaaahh!"

He shouted in surprise and pleasure when Summer suddenly pressed the vibrating stick against his shaft again, holding it close to the base.

"Do you want it here~?"

Morty could feel the vibrations in his very core from how hard she pushed against him. His back arched slightly as he tried to move even closer towards the source of pleasure.

"Or do you want it here?" She moved the item lower, making circling motions over his balls with it.

The sounds that Morty produced rather resembled those of a tortured animal now.
Still, Summer showed no mercy, looking rather delighted at hearing his howls.

Keeping the sweet torment up for a minute or two, it seemed rather abrupt when she suddenly went all the way up the shaft and focused the white round end directly on the head or her little brother's erection. "Or maybe this is where you actually want it~"

Morty's reaction to that was instantaneous and he arched up with a loud scream.

Rick's hand was already down in his pants and massaging his erection as he continued to bear witness to this scene.

Damn, why did Morty always have to be so vocal?!

'Such a little freak that you're letting your sister do this to you…' He thought.

By now, Rick already knew very well that his grandson was a pervert – way beyond what falls under the category of your typical horny teenager. However, he wouldn't have expected him to be an incestuous bastard like this.
Somehow, this realization just made his dick even harder.

The brunet's thighs were trembling and his member was leaking like crazy, covering the massage stick in his pre where it touched the slit.
However, just short before he reached his climax, Summer pulled away again. With a disappointed moan, Morty sank back on the bed again.

"S-Summer…just let me…c-cum…please…" He begged while taking in big gulps of air again.

"Oh, I don't know, Morty." His sister teased again. "You don't really deserve it…"

The brunet was desperate. "Please, Summer~ J-just touch me, please!"

"Ew! I'm not gonna jerk you off, Morty. That's gross!"

Rick had to catch himself from snickering at that statement. The irony of the situation made it just so hilarious.

Also, 'What the fuck, Morty?! Are you really that desperate to get off that you're begging your sister to jerk you now?'

It made him wonder if his grandson would also beg like this if it were someone else from their family who would be with him right now…

Not being able to take it anymore, Morty reached down to touch his pulsing flesh since Summer refused to help him. However, as soon as his sister saw the movement, she slapped his hand away.

"I didn't say that you could touch yourself." She scolded.

The boy whined pathetically again. "Please~ I r-really need to cum."

"Well, I didn't give you permission to cum now." Summer reprimanded him again. "As if I would want you to do that in my bed. Besides, this is still punishment for sneaking in my room and trying to steal my stuff!"

The redhead was really merciless, but Morty should have already expected that. Whimpering he twisted around on the sheets, still seeking some form of relieve. That he could technically ignore her threats and just go back to his room to masturbate in peace didn't even cross his mind.

"Please, Summer~" he began to beg once more. "I-I'm sorry a-and promise that I won't do it again. Just please let me have it."

The elder hummed in mock contemplation.

"I don't know…" She leaned over her writhing brother. "Maybe I'll change my mind if you confess what exactly you wanted to use my massage stick for."

"B-but you already know what I was going to use it for." Irritation swung in his voice since his sister's request confused him.

He had already confessed that he was going to use it to masturbate. What more did she want from him?

"Nu-uh. I want to hear in detail what you were going to do with it."

Before the boy could answer, she brought the still vibrating stick back between his legs again, rubbing it over his balls. And again, Morty was reduced to unintelligent moaning.

"You still haven't answered where you want it." She reminded him.

Instead of answering, Morty only rolled his hips, trying get more of that stimulation.

Unhindered by the lack of response, Summer let the stick trail up and down his shaft again, keeping the touches almost feather light just to tease him even more and pulling back every time that he tried to buck into it.

"You know, Morty…" She drawled and briefly pulled away once more. "…I bet you're a real freak…"

Almost gently, she let the vibrating device glide over his taint and Morty jolted as it touched his perineum for a moment. Summer looked a little surprised at the reaction, but grinned a second later again.

Another loud moan escape the brunet as his sister finally reached her intended goal and stopped at his entrance. "…I bet this is where you want to put it!"

She added more pressure as she pressed the stick against the unyielding opening and Morty clawed at the bedsheets.

"N-no! I didn't—I wasn't—I-I'm not!" He shook his head in denial even when his hips lifted again.

'Such a bad liar you are, Morty…'

Rick's hand pumped his own member more furiously.
Seeing Summer dominating her little brother like that was actually quite a turn on.
She'd probably make a good dominatrix with a bit more experience under her belt, he thought.
…also Morty would be making a really good sub…

"Ahh! No, S-Summer! Don't!" The brunet begged as the thick round tip pushed more insistently against his dry hole.

While it was true that he liked to play with his butt and put things inside there – something that he would never let his grandfather know because that would only encourage him more to make him smuggle contraband in his behind – he really hadn't intended to put the stick there. And especially not without any lube.

"Pl-please stop! Not th-there, S-Summer!"

The tip was digging into his rim, dangerously close to breaching him.

"Don't lie to me, Morty. I know that you're a little freak that likes to take it up the ass. Don't deny that."

She didn't really know, but she always had a hunch and suspected something like this. So, she wanted him to confess – to confirm that she was right about it!

"Y-yeah!" Morty admitted with a shrill voice. "B-but not this!"

Satisfied with the answer, the redhead finally decided to have some mercy on her brother. She stopped pushing the massage stick against the rosy pucker and moved slightly upwards again.

"Then maybe you like it more here?" With those words, she sought out his perineum again and pressed the vibrating object tightly against it.

Morty practically sobbed as his body was wrecked with pleasure, feeling the buzzing sensation traveling through every part of him and his nerve endings catching fire. Since he already had been so close to the edge it didn't even take a full minute of having his prostrate stimulated from the outside before he orgasmed.
With another sharp buck of his hips, he arched upwards and came all over the front of his yellow shirt, his hoarse scream accompanying the event.

Almost at the same time as Morty, Rick reached his climax as well, making a mess inside his underwear.

'…Fuck…'

His eyes were still locked on his grandchildren as he slowly pulled his hand out of his pants again…

Morty collapsed back on the mattress, completely worn out. His ribcage rose and sank with each gasping breath, his eyes were closed, tiny tears still clinging to the corners, his mouth was open and a bit of drool trailing down his left cheek, his still spread legs were trembling slightly from the aftershocks of his orgasm and he was sweating all over, his t-shirt completely drenched and ruined now – also thanks to the additional stain that he just left on it.

*Click!*

His eyes flew open. She did not just…!

Summer grinned like the cat that got the cream, her mobile in hand and admiring the screen.

She really just took a snapshot of him!

"Summer!" He screeched and scrambled to rip the phone out of her hand.

She pulled away and twisted her body around, hugging the mobile phone to her chest as if it was her most prized possession. However, the boy didn't give up and tried to lunge at her, both toppling from the bed and scrambling around on the floor now, completely disregarding Morty's state of undress and the mess he made.

With a flush of embarrassment on his face, he shouted at his sister. "Delete it, Summer!"

As the squabble turned into a wrestling match, Rick turned away from the door. He decided that it was getting too childish for his taste now…also, he was in dire need for a change of briefs.

While leaving, he thought that he also was going to hack Summer's phone later so he could get a copy of that picture for…completely scientific reasons of course…

AN: Whew! I still can't believe that it actually took me this long to write this. Especially since I had the first few lines down for months without getting any progress and now wrote the whole thing in practically one go. My muse can be really whimsical…
By the way, Summer's massage stick was a nod to the "Rick and Morty's Rushed Licensed Adventure" for those of you who haven't played it / are unfamiliar with that game.