Slark didn't consider himself to be easily fooled, but as he grimaced at the plant sitting innocently on the table in front of him, he was starting to reconsider that.

He'd overheard the idea for an "amazing aphrodisiac" from the rangers that he'd initially dismissed as drivel. No simple concoction could live up the ridiculous claims they made -- faerie fire didn't have any intrinsic magical properties. But the idea still permeated his thoughts, constantly nagging at him until he eventually gave in and "acquired" the ingredients himself.

The regret was starting to set in. Going through the effort of even getting this crap in the first place was already beneath him, he thought, but to mix up the brew like some kind of diviner was insulting. In the back of his mind, though, he knew he had one reason to just give it a try; one reason he even considered it in the first place: Slithice.

The siren was special to him. She always had been. Ever since they had properly gotten together, though, they both longed for what they couldn't have: intercourse. Though they were both Slithereen, the siren's anatomy didn't align with his own, mostly due to his strangely humanoid lower body. Though Slark assured her that he loved her regardless of whether they could breed or not, the desire still remained in his heart -- and, presumably, hers as well.

Slark shook his head. This wasn't going to go anywhere, was it? Even if this laughably simple brew were to make Slithice more lustful, it wouldn't magically allow him to… well, bang her. No mere potion could do that.

Could it?

He grumbled, and hastily began stirring the fae leaves into the pure water. He had already gone through the trouble of nicking the ingredients, so it would be a waste not to mix them at this point. Just get it over with, Slark, he thought to himself. Bring it to her, have her drink it, then go to bed. Say it was something special he thought of.

The mixture settled, and the sweet scent of the faerie fire blended with the pure, crystal clear water to make a rather aromatic brew. At least it smelled good, if nothing else. Muttering to himself, Slark poured a portion of it into a smaller bottle and threw it into his bag. Nothing left to do now except bring it to Slithice.

It wouldn't do anything. What a waste of time.

--

Slithice cocked her head. "What is it, exactly?"

Feigning a happier disposition, Slark forced a smile. "Somethin' I whipped up for you. It's supposed to, eh…" -- he dropped his voice to a low whisper -- "make you a bit more excitable in the bedroom."

The Siren gave a genuine, sympathetic smile. She appreciated the gesture, but knew just as well as Slark that their biology just wasn't compatible. Still, though, it wouldn't hurt to indulge him just this once. "How sweet," she crooned, her sweet voice raising Slark's spirits already. "Why don't we go and try it out?"

Slark leaned forward and gave his wife a lick on the cheek. She kissed him back in response, and they sat for a moment, pressed against each other, deeply in love.

"Let's go, then."

--

Slark sat upon the bed, watching Slithice disrobe in front of him. Though she didn't wear much in the way of armor to begin with, it was always exciting to him to watch her grace him with her natural beauty -- her scales shone like the moon over the ocean as she dropped her breastplate to the ground, exposing her back to him. She turned around, potion in hand, and uncorked the bottle. "Cheers," she said, downing the concoction in a single gulp.

Nothing happened. Of course nothing happened, the Nightcrawler thought to himself, dismayed. It's not like some magic--

"Oh!"

The Siren put a hand to her torso as she let go of the bottle, falling to the ground next to her armor. Her expression was one not of pain, but of confusion -- she felt something in her chest, but not like anything she had felt before. Slowly taking her hand away, she gasped in shock as she saw the transformation taking place.

Before her eyes, her supple breasts were expanding in size, easily eclipsing that of her head. A pair of nipples had appeared on them as well, making her appearance similar to that of a mammal's. Frozen in shock, she hesitated to put a hand on her chest again. Before she could react, though, another change had started.

Where her tail met her chest, the same place a mammal's legs would begin, she felt a strange warm sensation overcome her. Her flesh seemed to shift and disperse, until she was left with folds of skin that formed an entrance -- perfect for her partner. She looked up at him.

Slark's eyes were nearly bulging out of his head. He seemed to be in even more disbelief than Slithice. With his mouth hanging open, he took a few moments to collect himself, shook his head, and simply said "Wow."

The Siren laughed. "Well, that was certainly unexpected, wasn't it?"

Slark gulped and nodded vigorously, unable to think of a clever response. "Can… can I touch them?" he stammered, sounding like the nervous fish that had approached her years ago when they had first met.

The Siren slithered forwards and climbed into bed alongside him, laying herself down and looking up at her partner. "Of course," she said, giving him a tender smile. "I'm curious how they feel, myself."

The Nightcrawler could barely contain himself. He raised both of his hands to her breasts and squeezed, feeling just how much that potion added to her. They were certainly heavier, and felt softer to him as well. He could squish them with little resistance and bounce them around in his claws. Licking his lips, Slark groaned. "Gods. They look so nice on you."

The Siren laughed again, mostly at the absurdity of the situation. She never really thought Slark would be able to feel her up like this, and definitely didn't know he'd be quite so into it. With a reassuring caress, she dared him to go further. "Give them a lick."

Slark didn't have to be told twice. He flicked his long, nimble tongue across the surface of her breasts, making Slithice shiver at the feeling. Maybe it was just the properties of the potion, but they just felt so sensitive! The Nightcrawler kept at it, dragging his wet tongue all across her bountiful bust. He stopped at her left nipple, and toyed at it curiously -- if it weren't for his dangerous teeth, he'd suck it in a heartbeat -- but as he felt it harden, he knew she enjoyed the feeling just as much as she did, and gave the same attention to her other breast.

"Nngh… oh, fuck me, they're so… fuckin'..."

Unable to stop himself, Slark withdrew his tongue and plunged his snout between her breasts, nuzzling them and grinding against her passionately. Moaning, he cried out in desperation. "Good! Oh, gods, they feel good!" His muffled voice cracked with pleasure.

The corners of Slithice's mouth went up as she said nothing in response, just placing her hands on each of her breasts and pressing them against him as he snuggled her chest. Though it felt nice for her to be on the receiving end, she couldn't help but wonder how ecstatic Slark was to bury his face in like that. Something she might have to find out for herself later, perhaps.

"Mmf… mmm…" It sounded like her husband was having a bit of trouble breathing, so she let him up for air as she put her hands back down. Dazed, Slark pulled up and away from her breasts as he caught his breath. "Oh, fuckin' hell…" he sighed wistfully, his voice barely above a whisper, "I could just fall asleep between those things."

He kneaded them in his claws like a baker would work their dough. Soft, supple, and squishy; he could barely contain himself from squeezing them tight. Pushing his face back into her cleavage for another go, he moaned as her breasts enveloped him warmly.

Slathering his tongue all over her huge assets, he brought his head up again so he could give Slithice a good look as he pleasured her. It was obvious how sensitive they were: biting her lip as he toyed with her nipples spoke volumes to him. Slark could only hope the feeling was as nice as getting smothered with her lovely breasts.

They must have been bigger than his head. If he wanted to, he could simply lay down and use them as pillows, but it was far more enticing to use them as his playthings. It felt better for Naga, too -- each second Slark spent worshipping her breasts was another moment of sheer bliss. For both of them.

She leaned in and they kissed once more, Slark on top of her, the obvious bulge under his loincloth beginning to leak through the fabric and onto her. As she pulled her lips away, she whispered, "Please, Slark… fuck my tits."

She wasn't the type to use such dirty language on a regular basis, but to both of them, this counted as a rather unusual circumstance. Not one to reject her offer, Slark tore his skimpy cloth off and flung it to the side, his tapering pecker dripping with excitement. Positioning himself accordingly, he guided his cock between her breasts, then inhaled. He wasn't prepared for how good it was going to feel.

Slark started thrusting forcefully, producing a slapping noise each time her breasts bounced against him. Gripping them tightly, he threw his head back and cried out in sheer bliss as he slid in and out of her huge, beautiful rack. "Nnngh!" If it weren't already hard enough for him to form a coherent sentence, the feeling of Slithice's tits made him totally incomprehensible. All Slark could do was groan and moan with sheer euphoria.

Sliding in and out, his pink cock rubbed hard and close against her, massaged by her bountiful breasts. Though Slark wasn't a stranger to the idea of a good breast fuck, he admittedly hadn't had the chance to pull it off at all before. His first time, though, was almost certainly the best experience he could have asked for. Slithice's enhanced tits were plump and juicy… but most importantly, they were hers.

As he grunted with each wet thrust against her, though, the thought began to rise in their minds that there was something they couldn't ignore for much longer. While Slark would be happy with banging her breasts for hours on end -- and he wanted to! -- it would be unfair not to acknowledge that other strange effect the potion had on the Siren's body.

Without needing to exchange a single word, Slark slowly brought himself to a stop, and crawled a bit lower down Slithice's body to her newfound entrance. He licked his lips and whispered to himself as he took in the beautiful sight before his own eyes...

A tight, shiny vulva, ripe for breeding. He badly wanted to lick it, stick his tongue inside of her, let her feel him slither around inside -- but this couldn't wait. He needed to give her a proper fucking. She needed to be filled with his seed. They had wanted it for such a long time, and it now that the opportunity presented itself, it needed to happen.

Now.

Arms around Slithice's back, he easily slid his cock in and wasted no time getting to work. The fish was glad he was at least a little familiar with this part: he'd fucked a few other women before, and although none of them felt quite like the Siren did on the inside, a hole was a hole to him.

Unlike the previous flings he'd had, though, it seemed he wasn't the one holding the reins this time. The look Slithice was giving him was one of authority. He gulped. He'd do well to listen to a Slithereen that used to command the Guard.

The slippery bastard was agile, without a doubt -- Slithice's voice wavered with each hard, fast thrust into her, but she maintained steadfast. It was unlike anything she had felt before, a strange feeling of fullness inside of her, being held down by her love.

Her dominant streak shone through when she finally spoke again: "Ah… go back to using your tongue, would you?"

He couldn't help himself from greedily lapping at her body, even with his cock buried deep inside of her. His tongue lashed out, dripping, and he once more began to stimulate her sensitive nipples with it. Committed to pleasing her just as much as she was satisfying him, he let out rhythmic moans as he thrust in and out, his tongue polishing her breasts in time.

Slark's body was the perfect size to keep his face buried in her breasts, and hers was appropriate to keep him locked in place as he did so. It felt so warm, so comforting, so safe between her breasts, and his moans were muffled by her flesh. Slithice had no such luxury, though, as she cried out a final wish for Slark. "Cum inside me! Breed me, Slark!"

A final push, and he started to shake as he felt the explosion between his legs. Cum shot out in spurts, pouring deep inside of his wife, and his whole body went limp as all of his energy depleted at once. It left a complete mess down there -- the Siren's whole underside was splattered with sticky, warm fish cum.

Her grip on him relaxed, and he flopped over onto his back, breathing heavily. Glancing over at her, he grinned. "I don't normally like surprises, but that… was something else."

Slithice, just as exhausted as he was, gave Slark a small simper back. "The Guard was trained to anticipate surprises, but nothing quite like that." She snuggled up against him and began idly stroking herself with a free hand; exploring her areas where Slark had gotten to know her quite well.

"I think you handled it pretty well, eh?"

The Siren laughed. "So did you, Slark. So did you."

She brought her lips to his cheek and gave him a smooch, her breasts pressing up against him more obviously than they did on any other night. Slark shivered as he felt his body press against hers, still riding the high from tonguing her tits earlier.

"You don't mind if I, uh, sleep on those, do you?"

Slithice's sing-song laughter filled the little fish with joy and warmth. "Of course not, dear. Sleep well."

He snuggled his face deep in her breasts, and closed his eyes with a deep sigh. It wasn't long before he was out, breathing deeply, cuddling her breasts like a blanket.

With one arm wrapped around her loving husband, she lay awake, looking up at the ceiling above. Still feeling up her body, freshly full of fish spunk, she contemplated how she had managed to go this long without getting pounded by Slark. She'd let him know it the next morning: that went far above and beyond her expectations, for sure.

Her mind wandered off and filled with questions, but no answers. When would the potion wear off? How much should she use next time?

And, with a smile growing on her face, perhaps the best question crept into her mind: