My Mom is a Maternal Slime

"There, good as new!"

With extra energy gained from more groceries, Viviane lifts her chest proudly as she stands in her silver-haired "human" form. She then twirls for her audience, giving everyone a nice look how stable she can be.

"I've also matched my sister's measurements," she adds. "So we should be able to share dresses too!"

Breaking from his stare, Daniel clears his throat. "Shouldn't you give more color to your appearance? Hardly anyone I know goes out as pale as you are; silver hair, no less."

"What? I think it's wonderful!" Marianne counters. "Don't worry about our son. You're free to express yourself however you want!"

However, the elder slime hums, twisting her lips as she takes in the color of her hand. "No, our child is right. It's no good if I attract too much attention. Hmm...how about this?"

In a smooth transition, more color flushes as if warming up. Then, along with matching Anne's skin tone, her silky hair fades into a light blonde while maintaining silver highlights. The change is subtle, but enough that she doesn't look like a cold statue.

"How is it?" she asks, smiling meekly.

"Glowing!" Marianne is quick to answer, wiggling her lips in delight.

Daniel nods in agreement, but cocks his head. "Come to think of it, you've always held that silver appearance, right?

"As long as I've been aware, but it's odd, now that I think of it," Viviane admits, cocking her head. "I'm not sure where my look comes from considering I can transform into any appearance."

"Maybe your ghostly frame is meant to ward off visitors from the past?" the fusion suggests, grinning.

Viviane scoffs. "Perhaps if I were the 'Lady of the Lake'...urgh, I really hope that's not the case."

Tittering, Marianne waves her hand. "Well, let's not worry about that now. There's only one bit of history I'm interested in..."

Holding such thought, she flips her attention to Daniel beside her, then pokes him. "Such as having fun with Vivi-Mama without me! You owe Mama some time, love!"

The artist backs away a little with his hands up. Before he can properly respond to his mother-girlfriend's jealousy, Viviane sneaks behind him, squishing her chest against his back.

"Mommy wants in too!"

Humming into his ear as she rests her chin on his shoulder, the lake dweller's hands begin gliding beneath his shirt while unbuckling his pants.

Losing his train of thought, Daniel shivers in her hold. "W-wait, mother..."

"Hey, you already did it with him!" Marianne growls.

The lake dweller glances pitifully at her fusion sister. "Oh, so you're saying I should do nothing but watch, just as I've done many times?"

"Ugh...n-no, but-"

"Even though I also want to spend more time with you, my fellow mother?" Viviane adds, twisting the knife of guilt further.

It's effective, as the fusion grunts, shutting her eyes tightly. "Okay, I get it! We'll have a threesome...er wait, foursome?"

Viviane closes her eyes in delight. "My dear sister, let's not sweat the details. In any case, I'll just make it even!"

Squelch!

Daniel has no time to react to his mother's words as the lake dweller compresses further against his back. With his pants dropped, a cool sensation follows his bottom. Despite the comfort, the artist stiffens as he glances down. It shouldn't be too much of a surprise by now, but he still holds his breath as Viviane's legs open up, slithering around his own like a suit.

"Relax, my child," the slime whispers, rubbing his chest.

With crooked lips, Daniel chuckles nervously instead. "S-so, you're taking my body, huh?"

"Naturally~"

As his slime mother finishes coating his legs and genitals tightly, he jerks a little. Unlike when Anne connected with his nerves, he finds no control over his rise in libido. Driven by external forces, his cock pulses to full mass in seconds, all while Viviane's excitement pours through him like steroids.

"Oh, fuck...ngh."

Viviane squeals, hugging her groaning son tightly as their lower half solidifies as one.

Meanwhile, Marianne cups her mouth, swallowing slowly over her sister and son's shared cock. While some vitality is expected, she doesn't recall such an immediate impact when Anne connected similarly.

'Did it ever get that big when she...no, stop comparing!'

Shaking her head of lewd thoughts, she growls at her sneaky slime sister. "Love, you can't just take him like that!"

It takes a moment for Viviane to calm herself from the burst of aching pleasure that fills her, all thanks to her son's arousal being shared. While he's forced to wriggle within her grasp, she continues caressing his chest while her other hand moves to stroke their length.

Schlip...Schlip!

"Mmm...can't I? Aren't you being too...muah...picky, sister?" Viviane responds huskily, laying kisses across her shivering child's neck. "Besides, you've already connected with, anh, his body plenty."

Schlip...Schlip!

"Ungh...mother, s-slow down," Daniel pleads, succumbing to her hand. His legs twitch, and it isn't clear whether it's from his reaction or hers.

"See? Our child seems to like it."

"Clearly," Marianne scoffs, her forehead straining. "At least stop jacking him off this soon."

"Hehe, very well," Viviane accedes, slowing her strokes while targeting her voice at his ears. "Now, would you like Mommy to finish covering you, so we can fuck Mama together?"

Daniel's breath hitches at the idea, and so does his cock, throbbing in her hand as she flutters across. "T-that's uh..."

"We'll give your dear mother and girlfriend the best time if we're together, you know?"

"No, the best time with Mama is if we're the ones together," Marianne counters while undressing. Despite saying so, she then backtracks with a cough. "Although, I'll admit, I'm curious about what will happen to you two."

Daniel's lips curl up a little, finding Anne and Mary's separate influence clear in the ebony fusion's words. Glancing back at the current blonde beauty behind him, his legs shuffle to her convincing massage below. "Ngh...okay, fine. You'll just be overlaying my body like Anne did, right?"

"Actually, I want to share minds as well! How else are we going to match your fusion mother, hmm?"

"What?!"

Both Marianne and Daniel sound out at the same time over Viviane's larger goal.

Quickly, the artist shakes his head, his teeth chattering, "M-mother, I don't think it's a good idea. I mean, look at what happened with Mary; she's..."

The fusion gasps before her son catches himself, then harrumphs. "Well, excuse me, love. Mary is perfectly fine, if you must know!"

Daniel thins his lips, sweating. Of course, it somehow worked out with his artistic girlfriend; however, there's no denying the side effects of Mary becoming more motherly and lactating.

How would he fare? Surely, he wouldn't also become like that!

The lake dweller hums. "I do understand your concerns, child, but I can control how my knowledge and memories are shared."

The fusion and artist perk to this new detail. Of course, her increased self-control isn't too surprising given the number of centuries she's spent alone.

Smiling as the mood grows calmer, Viviane draws away from their hard member to hug the artist with both arms. "My child, I know it's early, but will you trust me enough to share with you?"

"How...how much would you share?"

"That depends. How much do you want to know?"

Before he can answer, Marianne steps forward. "Stop! Viviane, there are things he should not know! Even if you're confident, I wouldn't even be trying something like this."

The lake dweller's gaze soften. "I'm aware, sister, but this is our child's decision. I will, however, avoid sharing Amy's more classified discoveries, which she took to her grave. Those aren't relevant anyway."

"W-what about Mary?"

Viviane smirks at the fusion's growing fear, most influenced by the female artist herself.

"The way I see it, you already know many embarrassing stories about our child. It's only fair that he gets to see some of hers."

"No, please!"

"Alright, you've convinced me," Daniel answers, grinning a little at the fusion. "We need to be open and honest anyway."

Marianne leans back and groans before snapping forward with a pout. "Love, don't you dare tease me or Mary. She only mentioned your Harry Potter phase, and there were far more cute—I mean, embarrassing parts that Amy knew of."

Daniel clears his throat. "Alright, alright."

"That said, I'm still wary about this," the fusion reiterates.

"He'll love and appreciate us more," Viviane reassures, her eyes twinkling. "He might even start calling us Mommy and Mama."

"Actually, I am okay with this," the fusion corrects without misstep, her eyes sparkling back at her fellow mother.

Daniel's pupils contract. Gulping, he laughs nervously. "N-no wait, that's...not going to happen, right? I already love and appreciate you both!"

"Then, what's more?" Viviane whispers, giggling.

Squelch!

The lake dweller proceeds with expanding her upper half around Daniel before he can protest, matching his slightly larger frame while spreading feminine curves around. As the slime seeps into his underlying skin, he groans, filled with more of her drive.

The engine that is his heart beats to the elder slime's will. Along with that, she takes control of her son's arms and hands, restarting her strokes against their member.

They moan together, cupping one of her breasts that now extends from Daniel's front. Somehow, the artist can feel Viviane's chest as his own. It's a sensation that he never felt with Anne, who hadn't matched his form completely.

As Daniel takes in this strange yet pleasant union, Marianne watches the process with conflict. On one one hand, a beautiful fusion would be born; but on the other, she'd rather be the one joining with her son and boyfriend.

That's true, even as she already is composed of the female artist. Against such greediness, though, she holds back, giving way to her more experienced sister.

Viviane kisses her son's cheek as they quickly share shoulder space with a strong hold against their member.

She coos. "Oh child, we're almost one~"

"F-fuck..." Daniel breathes, his eyes glazed.

"Remember that this isn't solely our time together. Rather, it's our time with your lovely Mama."

Daniel exhales shakily as his gaze returns to Marianne. At that moment, his fusion mother can't help herself anymore and moves forward, taking his head into her hands.

"Love..." she breathes.

Closing her eyes, Marianne's chest squishes against Viviane's own, her lips taking in the only remaining part that is purely her sweet artist. With a sharp inhale, she kisses him.

In response, Daniel regains some control and stops the strokes of his cock to lean into her. With falling breaths, he wraps his arms around her frame while his cock pulses across her skin.

Viviane hums, pleased, before closing her eyes. Like Anne did with Mary, she allows her head to open up. Swiftly, her features recede as she finalizes her bond with her dear artist.

Squelch..Shlip!

While keeping his lips on his fusion mother, Daniel shakes. Taking in the motherly love before him and around him, he undergoes his first complete merge.