A few days had passed since that accidental glimpse in the nursery, and the tension between Stiles and Derek had only thickened, like a storm cloud ready to burst. They moved around each other with careful politeness during the day—sharing laughs over the babies’ antics, brushing hands while passing bottles or toys—but at night, when Matt was out (which was most nights, buried in work or whatever else), the air in the penthouse crackled with unspoken desire. Derek couldn’t erase the image of her fat tits from his mind, and Stiles found herself stealing glances at his muscled arms, wondering what it would feel like to be held by someone who actually cared.

One evening, as the sun dipped below the city skyline, it was bath time for the twins. Liam and Luca were extra squirmy tonight, their chubby little bodies wriggling in excitement as Derek filled the oversized baby tub in the nursery bathroom with warm water, swirling in bubbles that foamed up like clouds. He tossed in a handful of colorful rubber ducks and floating toys, grinning as the water sparkled under the soft lights. “Alright, little monsters,” he chuckled, his deep voice playful. “Time to get squeaky clean.”

Stiles stood nearby, watching with her kind smile, her porcelain skin glowing in the dim room. She was dressed for bed already—a tiny white nightdress that barely skimmed the tops of her thighs, the thin spaghetti straps doing nothing to contain her massive, milk-heavy tits. No bra, no panties; the fabric was so sheer it clung to her curves like a second skin, her pale pink nipples faintly visible through it. She wasn’t thinking about seduction—she was just comfortable, or as comfortable as she could be with her sore breasts aching from the day’s feeds. “They’re so naughty tonight,” she giggled softly, scooping up a naked Liam, his rolls of baby fat jiggling as he kicked his tiny legs. Luca was in her other arm, babbling happily, his chubby cheeks flushed.

Together, they lowered the babies into the tub carefully, the warm water making them squeal in delight. Liam immediately slapped his pudgy hands on the surface, sending bubbles and splashes everywhere, while Luca grabbed a duck and gnawed on it, giggling. “Oh, you two are wild!” Stiles laughed, kneeling by the tub, her nightdress hiking up her thick ass as she leaned in to splash back gently. Water dotted her dress, but she didn’t care—the babies’ joy was everything.

Derek knelt on the other side, his black tank top stretching over his ripped chest, jeans hugging his thighs. He was being extra playful tonight, making goofy faces that had the twins erupting in laughter. “Look out, Stiles— incoming splash attack!” he warned with a grin, cupping water in his big hands and flicking it lightly at the babies, who splashed back harder. Water flew, soaking his shirt, outlining his abs. The room filled with their shared laughter, the tension momentarily forgotten in the innocent fun.

But the babies were on a roll—naughty little things, splashing wildly, waves of bubbly water arcing out of the tub. One big splash from Liam hit Stiles square in the chest, and she yelped playfully. Derek, caught up in the moment, saw her laughing so freely and acted on impulse. “Oh no, the mommy monster needs a bath too!” he teased, his strong arms wrapping around her waist from behind. Before she could protest, he lifted her effortlessly—like she weighed nothing—and plopped her right into the tub with the babies.

Stiles gasped, her pink lips parting in shock as the warm water enveloped her, bubbles foaming around her legs. “D-Derek!” she squealed, but then burst into laughter, her voice light and breathless. The twins loved it—Liam and Luca clapped their chubby hands, splashing more water at her, their giggles echoing. “You little traitors!” Stiles playful scolded them, splashing back gently, her nightdress now completely soaked and plastered to her body.

Derek froze, his playful grin fading as he realized what he’d done. The white fabric had turned utterly transparent, clinging to every curve like wet tissue paper. Her massive tits were on full display, the pale pink nipples hard and poking through, milk already beading at the tips from the stimulation. Lower, the dress molded to her hips and thighs, outlining her fat pink pussy perfectly—the plump lips visible, no panties to hide anything. He stiffened instantly, his cock hardening in his jeans, throbbing painfully as he stared. Fuck, she was a goddess—dripping wet, laughing innocently with the babies, oblivious at first.

Stiles didn’t notice right away, too caught up in the fun, but then she glanced down and saw herself—saw how see-through she was, her pussy outline clear as day. Her eyes flicked to Derek, catching the massive bulge in his pants, and she flushed deep pink, her porcelain skin turning crimson. “O-Oh god,” she whispered, scrambling to her feet, water sloshing everywhere. She climbed out quickly, dripping onto the floor, and bolted for the door. “I-I’ll go change!”

Derek swallowed hard, his face burning, but he turned back to the babies, forcing a smile. “Alright, you two, let’s finish up.” He bathed them efficiently—washing their soft hair, rinsing off the bubbles—while his mind raced with the image of her wet body. The twins calmed down, yawning now, and he dried them with fluffy towels, rubbing their chubby bellies until they cooed. He dressed them in fresh onesies, Liam in blue, Luca in green, and carried them to their cribs. A few rocks and lullabies later—his deep voice humming softly—they were out, tiny chests rising and falling peacefully.

Stiles returned a few minutes later, now in another tiny dress—this one black and lacy, equally short, hugging her ass and tits. She tiptoed in, her kind eyes softening as she saw her sleeping boys. Leaning over the cribs, she kissed their foreheads gently. “Goodnight, my angels,” she whispered, her full pink lips brushing their skin.

Derek watched from the doorway, noticing the slight wince on her face as she straightened up, her hand subtly pressing to her chest. “Stiles? You okay?” he asked softly, concern lacing his voice.

She forced a smile, shaking her head. “It’s nothing, really.”

He stepped closer, his massive frame gentle. “Doesn’t look like nothing. Tell me.”

She flushed, biting her lip. “My… my tits are so sore. They hurt a lot tonight. The babies fed earlier, but… it still aches.”

Derek’s face heated, but he felt bad for her—genuinely. She was such a good mom, enduring everything alone. “I… I could help. I’ve read about massages for that. It eases the pressure, helps with the pain.”

Stiles’s eyes widened, her cheeks burning. “M-Massage? But…”

“The pain’s bad, right? Come on, let me try. In my room—it’s private.”

She hesitated, but the throbbing ache won out. Nodding shyly, she followed him to his guest room, the door clicking shut behind them. He sat her on the edge of his bed, the mattress dipping under her weight. Derek’s hands trembled as he knelt in front of her, his big doe eyes meeting hers. “Tell me if it’s too much,” he murmured, his voice husky.

He started over the dress, his large hands cupping her massive tits gently, massaging in slow circles. The fabric was thin, and he could feel the warmth of her skin, the fullness. Stiles moaned softly, her head falling back. “Oh… that feels better already,” she whispered, her voice breathy.

Derek’s cock twitched, hardening again. “Good girl,” he praised softly. “Just relax. Let me take care of you.” His thumbs brushed her nipples through the lace, and milk started oozing out, darkening the fabric. “Fuck, Stiles… you’re leaking so much.”

She whimpered, shy but aroused. “I-I’m sorry… it won’t stop.”

“Don’t apologize. It’s hot as hell.” He massaged firmer, squeezing her tits, feeling the milk coat his palms through the dress. Her moans grew louder, intimate and needy. “Does that feel good, baby? My hands on your big, sore tits?”

“Y-Yes, Derek… so good,” she gasped, her fat pink pussy clenching under the dress, getting wet.

He couldn’t take it anymore—the wet spots spreading. With trembling fingers, he hooked the straps and pulled down her dress, freeing her fat tits. They bounced out, heavy and leaking, nipples erect and dripping. Stiles gasped, covering her mouth. “Derek! What—”

“Shh, princess,” he soothed, his eyes dark with lust. “It’ll soothe the pain better like this. Let me make you feel good. These tits are fucking perfect— so full, so ready to be milked.”

She bit her lip, nodding, too turned on to stop. His hands engulfed her bare tits, massaging deeply, thumbs circling her nipples. Milk squirted out in little streams, dripping down her stomach. “Oh god, Derek… pinch them,” she begged, her voice filthy.

“Like this?” He pinched her nipples gently, then harder, rolling them between his fingers. Milk flowed freely, coating his hands. “Fuck, look at that—your milk’s everywhere. You’re such a good mommy, aren’t you? Leaking for me like a little slut.”

Stiles moaned loudly, arching into his touch. “Y-Yes… I’m your slutty mommy. Squeeze harder, please… it feels so fucking good.”

He played with them relentlessly—kneading the soft flesh, slapping them lightly to watch them jiggle, pinching until milk sprayed. “These fat tits are mine tonight,” he growled. “Gonna milk you dry, baby. Hear how wet you’re getting? Your pussy’s dripping just from this.”

Her milk kept leaking, no matter how much he squeezed—endless, warm streams. Derek’s control snapped. “Still so full… need to help more.” He leaned in, latching onto one nipple, his hot mouth sucking hard.

Stiles gasped, her hands flying to his hair. “D-Derek! Oh fuck… you’re drinking my milk?”

He hummed around her nipple, sucking deeply, his tongue swirling as sweet milk filled his mouth. “Mmm, tastes so good, Stiles. Like fucking candy. Be a good girl and let me drain you.” He drank hungrily, like a starved baby, his free hand squeezing her other tit, milk dribbling down his chin.

Stiles moaned wildly, her pussy throbbing, clenching on nothing. “Suck harder, baby… empty mommy’s tits. Oh god, your mouth feels amazing— so hot, so wet.”

He switched sides, latching onto the other boob, his teeth grazing her nipple as he sucked. Milk poured into his mouth, and he swallowed greedily, playing with the first tit—pinching, twisting, making more leak. “You’re soaking my bed, aren’t you? Cumming from me eating your tits like this? Dirty girl.”

“Yes! Fuck, Derek… I’m so wet… gonna cum… don’t stop sucking!”

He devoured her—alternating, sucking one while fingering the other nipple, milk everywhere, the room smelling of her sweetness. Stiles’s body trembled, her moans turning to cries. “I’m cumming! Oh fuck, just from your mouth on my tits!”

She shattered, her orgasm ripping through her, pussy gushing juices that soaked her thighs and the bed. Derek pulled back, stunned, watching her shake—milk still dripping from her now-emptied tits.

Stiles panted, embarrassed, her face flushed. “T-Thank you… I feel better.” She stood quickly, pulling up her dress, but a wet patch trailed down her thighs, her cum visible.

Derek noticed, his cock aching, but he let her go. “Anytime, princess.” As she left, he groaned, palming himself—knowing this was just the beginning.