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It's Just Human Nature (MysteriousD/DaddysLittleSkank)

"Uh yeah, I like it." Morgan said clearly impressed. "I've wanted to live in a treehouse since I was like five and that has to be the coolest treehouse I've ever seen EVER!"

Marceline had a hand on either side of his head as she pressed her body against his. It'd been awhile since the last time she'd been with anyone but it definitely wasn't showing. She backed her face away and sat up so she was straddling his lap. "I wanna see how much of you is robot." She said, taking off his shirt.
 
"Haha, yeah. Wait, till we show you inside," Jake told her with a smile before he stretched them over there. "Oh hello! Who is this?" a strnage voice said. Jake picked up the stranger and introduced them to Morgan. "Morgan, this is BMO. He lives with us here," Finn said to her with a smile. "BMO, this is Morgan, our new friend and another human," he explained to the little robot.

Diego kept making out with Marceline, simply going on with instinct. He was clearly inexperienced, yet every moment he filled with unbridled affection and feelings that he had for the Vampire Queen. When they parted, he stared at her, a mix of shock, surprise and joy on his face. He was clearly enjoying this while also showing he never felt like this before. He let her take off his shirt so she can look. "It's ummm... complicated," he said. When she took of his shirt, she'd see better his condition. The machinery that made him a cyborg was bonded to him on a cellular level; millions of cell-sized robots were in him, bonded with his cells and his biological components. When his shirt off, one could see better it. To those who could see it, his skin had tiny hexogram patterns. His vein went in striaght geometric lines and had a slight glow to him. Even his skin despite looking like normal human skin, had a slight chrome hue to it.
 
Morgan smiled as she reached out her hand carefully to shake BMO's. "Well are you the cutest thing I've ever seen?"

"It's badass looking." Marceline replied as she reached for the bottom of her shirt. She pulled it off over her head, revealing she wasn't wearing a bra. Marceline then lowered herself again to resume making out with Diego. She had figured out he didn't have much experience doing this sort of thing but she also knew she had a ton of experience, so Marceline just figured she'd be taking the lead on this one.
 
"I am BMO!" BMO said before the little robot shook Morgan's hand. "I did nt know there was another human here," BMO said. "Yeah, BMO's our robot bud. BMO stands for Be More," Finn clarified to Morgan. "You can play games on him and such," he added.

Diego blushed even more when Mrceline complimented him, but he was utterly gobsmacked when he saw her not only remove her shirt, but reveal her rather nice-looking breasts. However, he did not have much time to think on this since his lip met hers once more. He let her take it up, all too happy to return the gesture with as much affection he could muster.

The growing intensity and experience was arousing him and it was becoming obvious by his growing bulge, but he was too lost in the passion to truly notice.
 
"Well, could you Be More cute?" Morgan said. "The answer is no you couldn't be any cuter!"

While kissing Marceline reached down to Diego's pants and undid them before pulling them off. She then backed off again to undo her pants and pulled them off. Once she was naked, she stood in front of Diego, asking, "You like?"
 
Both Finn and Hake were chuckling at seeing Morgan dawn over BMO. BMO himself was giggling with mirth and joy as well. "Ready to see the inside?" Finn asked Morgan while he saw her play with BMO with a smile.

Diego was broken from the passion when he felt Marceline's cool hands snake into his pants before pulling the. Off. He blushed even harder since he was now in the nude in front of the girl he was falling for. He was of average size, probably a bit bigger. However, any problems over his nudity was swept away when he saw Marceline strip in front of him.

Her confident and sexy smile kept dumbfounding and arousing him. "Uh huh," was all a Diego could say as he was ogling at the sexy vampire queen.
 
"Only if I can bring BMO." Morgan said picking up BMO.

Marceline smirked before she got back on the couch. "Prove it." She said wrapping her arms around his neck and kissing him. She reached down with one hand as she positioned his dick at her entrance and pushing the tip inside.
 
"Well yeah, of course. Maybe we can even play some video games after we give you the grand tour," Jake told her as they began heading toward the treehouse. Finn opened the door for her to go in first and let her take in the sight. "What do you think? Pretty mathematical, right?" he said with a smile as he let her look in at their home.

Diego shivered in delight at seeing Marceline's smirk. The vampire queen had her claws deep within him; he was practically putty in her hands. He eagerly wrapped his own arms around her and returning the kiss fervently. He groaned in pleasure when he felt her cool hand touch his cock and position it near her entrance. Diego let instinct guide him, grinding gently against Marceline. He groaned out loud as he pushed his whole cock inside of her, giving his virginity to the vampire queen.
 
"Uh... only a lot!" Morgan said excitedly. "And here I thought Marceline's place was awesome."

"Someone's excited." Marceline chuckled. She let out a moan as she felt Diego grinds against her making her even more wet than before. "Oh yes!" She exclaimed feeling Diego push his entire length into her.
 
Finn and Jake smiled at Morgan's excited look as the gave her the tour. There was of course the bathroom, the bedroom, the kitchen and the treasure room all around the large treehouse. "And this place could hold more. I remember back when Kim tried to turn this place into a hotel," Jake noted, looking at the memories of his son. "And that's Diego's room. It's the newest thing we added," Finn showed to Morgan the strange metallic door sticking out a tree wall.

Diego just blushed and smiled shyly at Marceline's teasing. Diego held onto Marceline tight, not wanting to let her go. Not now. Not ever. The vampire queen had claimed domained to his heart. He was going at a rather erratic pace, namely because this was his first time. However, what he lacke din experience, he made for in passion and genuine feelings. He always wore his emotions on his sleeves and his face clearly showed how much he loved her while he was fucking her on the sofa.
 
Morgan went with them as they showed her around. "Fancy, he gets his own room." She teased. "I get my own couch."

Marceline continued to moan as she went back to making out with Diego. She was loving his erratic thrusting as it kept things interesting. Between kisses she managed to say, "fuck... me... harder... and... talk... dirty... to... me...!" As these words escaped her lips she began moving her hips to somewhat match Diego's thrusting.
 
"Well, it is a small one and he did carve it out of the tree himself," Finn explained to her while chuckling. "You wanna play some video games on BMO," Finn offered to herbwjth a smile. "Well, it'll just be the two of you. I gotta go meet up with Lady," Jake told them with a smile as he looked at the clock.

Diego began moving faster and harder when he heard what's Marceline told him. He wanted to help pleasure her and the intense pace alONG with the makeout session was just absolutely breath-taking. "You're good. You're so fucking good. I wanna do this more," Diego told her between the kisses. In a moment of boldness, he gave a tender lovebite on the neck while he kept going faster.
 
"You can play video games on him!?" Morgan asked shocked. "I have some video games back at Marceline's place if you wanna go grab em."

Marceline continued moaning as she felt Diego start going harder. "Oh Glob yes!" Marceline said between moans before she let out a louder moan caused by Diego's bite. "Keep going, Deigo," she moaned, "you're gonna make me cum!"
 
"Yeah, though only certain ones he has on him so I'm not sure you have any that could play on him," Finn explained to her. "Indeed. I can only paly certain games. Would you like to see one?" BMO offered to them. "I'll be back later guys. Have fun," Jake said cheerfully though there was some slight teasing at the two of them when he said it.

"O-oh gob this is wonderful," Diego moaned out as he was going out faster and harder even still. His cyborg body allowed him to go further than most humans could be expcted to go, and the pleasure was intense. Her words made him keep going. "S-should we cum together?" he asked her, looking lovingly into her eyes through his glasses.
 
"Kay have fun Jake." Morgan said waving before turning her attention back to BMO. "Sure, although you'll probably have to explain how to play."

"Too late," Marceline said moaning as her body tensed, "I'm cumming!" She let out a long, loud moan as wave after wave of pleasure hit her body like a tsunami. After she'd finished, she stood up allowing Diego's cock to fall out of her. She quickly began sucking him off, coiling her snake-like tongue around the shaft as she raised and lowered her head.
 
"It's not hard," Finn told Morgan with a smile before he got the two controllers out and spent the next couple of mintues showing her the buttons. It wasn't that much different from standard controllers and so on. "You played a lot of video games when you were younger?" Finn asked her as BMO sat down and was setting himself up.

Diego groaned out loud in sync with Marceline when he felt her pussy squeeze his cock tight and he felt her cum splash on him. He was at his breaking point, but before he could cum, he saw her pull out and began sucking him off and teasing him with her long tounge. "Oh Marceline..." he groaned out in pleasure. "I'm gonna..." he began to say before he groaned in pleasure and began to cum. His legs shook and he kept moaning at the intense sensations felt.
 
"Yeah," Morgan said with a small smile, "I mowed yards all summer to buy a console and get some used games. When I left home I brought it all with me."

Marceline swallowed all of Diego's cum. She took a couple deep breaths before speaking, "sorry, but you aren't wearing a condom and I'm not on birth control."
 
"Oh wow! We'll have to try it out sometime, though I'm not sure if it'll work with BMO. The only person who could... well, he's gone now," Finn stated as he set up a fighting game for them before curiousity hit him. "Do you anyone named uh... what was it... Moesph Maestro Giovanni?" he asked her as he managed to recall the name.

Diego was panting, his body covered in sweat. He couldn't help but oogle at how Marceline swallowed his cum. "I understand though I'm not even sure how my roboty parts affect that," Diego noted after a period of stunned silence. Without warning, he then went in to hug Marceline. He felt her nude body touch his and is was quite nice to say the least.

"You were my first... and I couldn't think of anyone better than doing it with you... It was... sublime," he said during the embrace. "How... how was I?" he asked her a bit nervously.
 
"Can't say I've ever met anyone with that name before," Morgan said playing the video game, "and I'd remember that name."

Marceline smirked as she returned the hug. "You were amazing, probably one of the best I've ever had." She kissed. "Most of the guys I've been can't manage to find my g-spot but you all the right buttons."
 
"Oh, it was because he apparently was some sort of famous guy beforehand. He was the guy who invented BMO. He was around before the Mushroom War and he kept himself alive by turning himself into a cyborg," Finn explained the backstory of BMO. "He's my pop," BMO said with a chipper tone.

Diego blushed at Marceline's earnest compliments and savored being in her embrace. He shyly kissed her back. "D...do you still wanna have movie night together or do you just wanna rest or what do you wanna do?" Diego asked her. Despite having gone all the way with her, she still had a way of overwhelming hm with these emotions.
 
"I must have been frozen before he got famous." Morgan said. "Although it is still weird that I've never heard of him, I was aware of a lot of stuff while I was frozen." She giggled at BMO, "you'll never guess who my pop is."

"Can't really watch TV since I smashed the scream." Marceline looked at her broken television. "And I don't think I have another in the basement."
 
"Who is it?" BMO asked Morgan while Finn was finishing setting everyting up and started the fighting game. Finn picked his usual guy and waiting for Morgan to choose. "It's the Ice King," Finn told BMO, much to the shock of the little robot. "Really?!" he exclaimed.

"Well, I can try and help you find a new one later," Diego offered shyly as he was recovering from his sexual high. "What do you wanna do?" he asked as he looked at her with a greater sense of affection.
 
"Yeah, it's kinda a long story." Morgan said as she scrolled through the female characters finally choosing one that looked sexy and badass. "We've hung out a couple of times. I think he's gonna try and make me a crown since I'm technically a princess."

"Well I'd say make out, but we'd probably just have sex again." Marceline thought. "Can you play an instrument?"
 
"Yeah, though as long it's not a magic one," Finn noted, in regards to the crown that cursed Simon into becoming the Ice King. "I suppose we should call you Ice Princess now," Finn added with a smile as he started the game between them in the fight.

Diego blushed when Marceline mentioned making out and sex. However, his cock twitching indicating he wasn't opposed to the idea. "I... I played the clarinet back when I was younger, " he said with a blush, realizing they were still nude.
 
"I wouldn't mind one certain powers, like if it could make a shield or something to protect me." Morgan began skillfully pressing buttons. "You can call me whatever you want, but I'm still gonna kick your butt."

"Nice Squidward." Marceline teased. "I don't really think a clarinet and a bass guitar are gonna sound that great together, wanna go for round two?"
 
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