Okay everyone!

New chapter about to commence!

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Fionna spent her day wandering down by the pond with Cake, who refused to get wet, refusing to let the topic of Marshall Lee drop.

"Hey hun," Cake started, her joyful manner lost, replaced by her serious, "we need to talk" voice, and Fionna sat down on the bank, letting the water flow over her feet. Cake was going to be serious for a moment, and she might as well be serious and pay attention. "You know when Marshall was singing at the graveyard," she said carefully, seeming to choose her words. Fionna nodded.

"Honey, when he said "I'm a bad little boy, yes I'm bad but not little", did you know what he meant?" Fionna looked up. What an odd line to bring up. She paused and thought about it,

"Well, he said that he's a bad boy, but he's not tiny?" She looked confused at Cake, and stared up at the sky thinking hard. How was she supposed to know what the lyrics to his song meant. "Guess he's saying he is bad and he was referencing that he can turn into a giant bat, to prove that he's bad?" She said this questioningly, feeling as though this made sense, somewhat. She looked at Cake, who's face clearly read you missed the whole point.

Cake shook her hand and looked at her very sternly, "Fionna, this is going to be tough, so just sit there and be quiet while I get this over with." Fionna grimace, knowing this wouldn't be pleasant, seeing how uncomfortable it made Cake. "Fionna, men have penis's." Fionna nodded, not exactly sure where this was going, but knowing it was going to get much worse. But she knew about anatomy, and that sex had something to do with the male and female parts, but Cake continued. "When he was saying he wasn't little, he was making a crude reference to his junk and-"

Fionna went white in a heart beat. Cake didn't stop talking and she could feel her face surpassing any shade of red she could have ever imagined. She was speechless at Cake's hand motion and explanation of everything Marshall had ever said to her. He wasn't just flirting, he was practically having sex with her in his mind when the spoke! No wonder Gumball called him impolite company.

She sat there for ten whole minutes, the sun setting fast in the distance, her face more red than ever as her mind trailed off to very dirty places... Before Cake could get much further into the topic of how sex worked, right after she had finished explaining how Marshall Lee defiantly liked her, or at lease was interested, she panicked, her mind think of all the things Cake had said. She suddenly felt overwhelmed and she screamed, cutting across Cake most recent explanation, and bolted back to the tree house as fast as she could. She didn't want to hear what happened after foreplay. Why of now of all times did she have to feel so... horny. Cake had said the word was anyways.

XxX

Marshall Lee was floating over the hill, thankful the suns rays were no longer out, when he heard her scream. He started flying faster, but before he could find her, she tore right past him, running straight for home. He saw how red her face was, but he was distracted when he heard Cake yell behind him, "Wait, Fionna! I wasn't done yet!"

Marshall landed next to a panting Cake. "What's up with all of that?" He gestured a hand towards the tree house, where they both heard the door slam.

Cake laughed a little and said, "Oh, you know, the sex talk, filling her in on all the innuendoes you always say." Cake burst out laughing when she saw his face, but he was to mortified to care. He didn't know whether to feel embarrassed, or clever, because some of the things he said to her were just so damn good, or just damn scared, thinking that Fionna now knew all of the shit he pulled.

'Well,' he thought slowly, 'At least sex, and ME are on Fionna's mind tonight.'

He looked down at Cake, who stretched her paws out, "Well," she said, "I'm off to Lord M.'s for the night, and hey!" she said turning around, "No funny business, you feel me?" She looked at him very crossly, and Marshall smiled and put a hand on his chest, "Who me?"

Cake made a face at him and took off again, heading out in the distance. Marshall looked at the tree house, as the sky become dark and he grinned. Game in motion.

XxX

Fionna sat on her bed, drenched after she had ripped off her clothes and stood in the cold water of the shower the second she had gotten home. It didn't help he situation much, so she warmed up the water and dried off carelessly. She knew Cake was out tonight, but she was still imagining such dirty things. She looked around the empty house and then stepped out of the shower room, pulling on a shirt and a pair of underwear before she stopped.

She set a tightly gripped hand on top of the dresser, and slowly shut the drawer. She didn't do this often, seeming as Cake was always around, but one free night, she might as well.

Shakily she turned out the lights, letting the light of the moon illuminate her bed. She slowly lowered herself onto it. She felt her face heat up and she laid back, trying to relax. She let her hand rest on her stomach, taking a moment to breathe, before slowly trailing it down. She thought of him, his face, his smell.

She imagined him rubbing his hands over her body, she could almost see him. She could just almost hear his breathing with hers, she could feel his fangs on her neck. She placed her hand over her panties, directly over her nub, lifting her legs to splay them open. She imagined his hand down there as she started to rub, gasping and digging her heels into her mattress. It had been far too long since she had last done this.

XxX

Marshall floated over to the house about to barge in when he saw the lights flick out. He backed away from the door and looked up curiously. Deciding that scaring Fionna while she slept could be fun, he floated up to her bedroom window. At that point he nearly lost it.

He immediately ducked down, his breathing ragged, face severely flushed. He felt the image of Fionna would be burned into his mind. She was jerking off, and pretty hardcore by the look on her face. He blinked, still seeing her torso curling up, her head thrown back, lifted off the sheets as her hand twitched and jerked. He heard a soft moan, and slowly he floated higher to watch her.

Clearly, she didn't really know what she was doing, he noticed. But she was shaking and moaning. She leaned her head to the side, and it was like she was begging him to bite her. He grew stiff as he heard her give a long throaty moan, her back arching, as she threw her head hard into the bed, and banging it repeatedly.

He knew she was getting close when she started moaning more, and she even made this cute little higher noise, it was a mix of sweet distress and pleasure. His crotch throbbed painfully and he pushed down on it till it hurt.

Fionna was sweaty, and he could literally taste her pheromones and scent on the air. Her hand started to slow, obviously tired and Fionna bucked the air hard, a very distressed noise leaving her body. Marshall bit his lip so hard this time he did puncture himself. No longer able to resist he quickly slipped his jeans down enough to expose himself, and quickly started yanking himself too. Fionna groaned and continued, her hand spastically jumping.

"M..." she said, and he groaned as quietly as he could, still watching her. "M-Marsh...lll..." he looked up, his face turning more red by the second, "Marshall...please," she begged, her hand slowing down still but she refused to let it. She flipped her head to the side, back arching so her neck was bare, "Please... bite me...ughhh..." she groaned louder, strength returning and Marshall felt his own orgasm approaching. "Marshall! Marshall Harder!" She yelled loudly, and he came hard, hearing the noise clearly over his own whirling passion. First the squish of wet clothing, the quick hitch in her breathing as she yelled his name again, "Marsha..." and then she yelled incoherent words as she froze in mid fling as her middle tensed so tightly she was forced to sit up.

Her eyes twitched for a second as her body started shaking, and she fell to her side, facing the window thankfully. Marshall had caught the white fluid with his hand, while the other braced his body up against the side of the house. She looked like she was seizing, her hand clamped so firmly between her legs he doubted trained professionals with crowbars could remove it.

He watched her body slowly relax, and she sat up, and slid off her bed. He saw the wetness on her underwear, and he watched her try to walk to her dresser, legs shaking so much she literally fell down oh her knees, and sat curled up for a moment. He did his best not to groan at this, imaging what would happen if they had sex, a sweaty piece of hair falling in front of his face.

She walked over and stripped off her used underwear, throwing them to the dirty laundry pile, giving him a glorious view of her supple backside as she tugged on a new pair of underwear and stumbled to her bed, falling face first on it, sighing contentedly.

Knowing the show was over Marshall grabbed a handkerchief from his back pocket and whipped of his hand, and quickly yanked his pants up. He shot off into the air, far above Fionna's house so he could... well even he didn't know what this emotion was. But he laughed, elated, spinning in the air.

If she could orgasm, through her underwear, not even actually touching skin... He groaned again as his crotch twitched and started floating home. He would give her this night of rest, but as he looked down at his own crotch, it seemed as though he might be up a little longer.

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Bonus spoiler: Marshall Lee kisses Fionna! Right before they...well Next chapter!