The next day dawned bright and tense for Tae. He paced the penthouse floor, his mind a whirlwind of embarrassment and reluctant curiosity. Mimi had kissed him goodbye that morning, her pretty eyes sparkling with hope. “Go see Mom, baby. She’ll fix everything. I trust her completely.” Tae nodded, but as he drove to the clinic, his hands gripped the steering wheel tighter. Exposing himself to his mother-in-law again? Alone? It felt wrong, but that brief spark from her touch yesterday… it was the first time in months his cock had responded at all. He pulled up to the sleek building, adjusted his button-down shirt over his slacks, and headed inside, his tall frame commanding the space even as nerves twisted his gut.

Koo was waiting in her office, the door ajar like an invitation to sin. When Tae knocked lightly and entered, she rose from her desk with a predatory smile, her beauty hitting him like a freight train. Today, she was dressed—or barely dressed—in a sheer, see-through white top that clung to her massive tits like a second skin. No bra, of course—her fat, heavy boobs were fully outlined, the dark pink nipples hard and poking through the translucent fabric, begging for attention. The top was cropped short, exposing her toned midriff, and below it, a tiny black skirt that was more like a belt than clothing—barely covering her thick ass, riding up with every movement. No panties; her bare pussy lips peeked teasingly if she shifted just right. Her long legs were accentuated by red heels, and her makeup was smoky, lips glossy red, ready to wrap around something thick.

“Welcome back, Tae,” Koo purred, her voice low and husky, stepping forward to greet him with a hug that pressed her enormous tits against his chest. He could feel the heat of her body, the way her nipples scraped his shirt. “So glad you came alone. We can really… dive deep into your treatment now.” Tae flushed hot, his cheeks burning as he pulled back, his dark eyes darting down involuntarily to her outfit. God, she looked like a high-end escort, not a doctor. His cock stirred faintly in his pants, a traitor twitch that made him shift uncomfortably. “Uh, thanks for seeing me, Koo,” he muttered, voice rough. “This is… awkward as hell.”

Koo laughed softly, a throaty sound that sent shivers down his spine. “Aw, don’t be shy, handsome. Sit down, right here on the chair.” She gestured to a plush armchair in front of her desk, her hips swaying as she turned. Tae sat, his long legs spreading slightly, trying to play it cool. But then—clink—a pen “accidentally” slipped from her desk, rolling to the floor at her feet. “Oops,” Koo said innocently, bending over slowly, deliberately, to pick it up. Her tiny skirt hiked up completely, exposing her fat, juicy ass cheeks—round and jiggling slightly as she arched her back. And there, framed between her thick thighs, was her puffy pink pussy, lips swollen and glistening with arousal, no hair in sight, just smooth, inviting flesh. The sight was obscene, her ass so thick it blocked the light, her cunt lips parting just enough to show a hint of wetness dripping down.

Tae’s breath hitched, his eyes locked on the view. “Fuck,” he whispered under his breath, his massive cock twitching harder now, swelling against his slacks. He’d never seen a pussy like that—fat, pink, and so blatantly on display. His mother-in-law’s pussy. God, what the hell was happening? Koo lingered a second too long, wiggling her ass teasingly before straightening up, her skirt falling back—but not before she caught him staring.

She turned, a slutty smile curling her lips, and without a word, she hiked her skirt up fully, exposing her puffy pussy to him head-on. Her fingers traced the outline of her swollen lips, dipping lightly into the wetness, circling her clit with a soft moan. “Like what you see, Tae?” she teased, her voice dripping with filth. “This is part of my technique, you know. To test if a man can get hard naturally. Visual stimulation. Does Mommy’s fat pussy make your big cock twitch?” Tae gasped, his handsome face turning beet red, but he couldn’t look away—her pussy was mesmerizing, lips so plump they looked like they could suck him in. “T-Koo… what the fuck? This is… you’re my mother-in-law,” he stammered, but his dick betrayed him, hardening a bit more, tenting his pants.

Koo giggled wickedly, turning around to show him her fat ass again, bending slightly and making it jiggle with a slap of her hand. The cheeks bounced hypnotically, rippling like jelly, her pussy peeking from below. “Oh, come on, Tae. Look at this thick ass—imagine grabbing it, spanking it while you bury that monster dick inside me. It’s just therapy, baby. See? Your cock’s already responding.” Tae groaned, his hand instinctively adjusting his growing bulge. “Shit… it’s twitching. But this is wrong… Mimi…”

“Forget Mimi for a second,” Koo whispered, sauntering closer, her ass still jiggling as she moved. Then, with a flick of her fingers, she unbuttoned her see-through top, letting it fall open to reveal her massive, fat tits in all their glory—heavy, round, with huge dark nipples erect and begging to be sucked. They bounced free, swaying as she cupped them, playing with the nipples, pinching and twisting. “God, Tae, look at these tits. Like a ’s, right? So big and full, perfect for wrapping around a thick cock like yours. Squeeze them, imagine tit-fucking your slutty mother-in-law.” Tae’s eyes widened, a deep groan escaping his lips. “Fuck… you’re built like a goddamn , Koo. Those tits are huge… but we can’t…”

Koo smirked, stepping even closer, her tits heaving with each breath. She adjusted her top slightly, not closing it fully, just enough to tease, then explained in her sultry voice: “My special techniques aren’t in any textbook, Tae. They’re hands-on. Or should I say… body-on. I use everything I’ve got to make limp cocks stand tall. And yours? It’s already waking up.” Before he could protest, she straddled him on the chair, her thick thighs spreading over his lap, her bare pussy pressing directly against the bulge in his pants. Tae stunned, his hands freezing at his sides. “Koo! What the—”

“Shh, baby,” she cooed, grinding down slowly, her fat pussy lips parting around the outline of his massive cock through the fabric. “I just wanna know if you can get hard with my techniques. Feel that? My wet cunt rubbing on your big dick. It’s therapy, Tae. Nod if you want me to continue.” He hesitated, but the heat, the friction—it was intoxicating. He nodded, breath ragged. “Y-yeah… okay.”

Koo grinned like a devil, starting to grind like a real slut—hips rolling in filthy circles, her fat ass bouncing on his thighs, her massive tits squishing against his face as she leaned forward. “Mmm, that’s it, feel Mommy’s pussy soaking your pants. I’m such a dirty whore for this, aren’t I? Grinding on my son-in-law’s huge cock like a needy slut. But it’s to arouse you, baby—to make that monster hard so you can breed my daughter.” Her words were lies; she was loving every second, her clit throbbing against his hardening shaft. She ground harder, faster, her juices smearing on his slacks, the wet sounds filling the room. “Fuck, Tae, your dick’s so big even soft. Imagine it stretching my fat pussy wide—pounding me until I scream.”

Tae groaned into her tits, his face buried in the soft, heavy flesh, nipples brushing his lips. “Koo… oh god, this feels too good. Your pussy’s so wet… dripping all over me.” He could feel it—her arousal soaking through his pants, warm and slick, making his cock swell bit by bit. “You’re making me hard… fuck, it’s working.” Koo moaned loudly, grinding like a  in heat, her ass clapping softly against him. “Yes, baby, get hard for Mommy. Feel these big tits smothering you? Suck on them if it helps—bite my nipples, make me cum on your lap.” She was filthy, her hips bucking wildly, pussy lips dragging up and down his now semi-hard length. “I’m such a slut, Tae. Rubbing my cunt on you like this… but it’s for therapy. Tell me, does my fat pussy feel good? Wetter than Mimi’s, huh?”

Tae’s hands finally moved, gripping her thick ass cheeks, squeezing the jiggling flesh. “Shit… yes, Koo. Your pussy’s so puffy and hot. Wetter than anything… god, you’re a fucking tease.” He was getting harder, his massive cock throbbing now, pressing up against her grinding folds. The friction was intense, her tits bouncing in his face, nipples hard as diamonds. “Keep going… I’m almost there.” Koo laughed breathlessly, grinding even sluttier—back and forth, side to side, her clit catching on his zipper. “Cum for me if you need to, baby. Let that big dick explode in your pants. It’s progress—Mommy’s technique is making you hard.”

The dirty talk pushed him over. Tae’s cock fully hardened for the first time in ages—thick, veiny, pulsing against her—and then he came hard, groaning into her tits as hot cum spurted into his boxers, soaking through. “Fuck… Koo, I’m cumming… sorry, shit, I’m sorry!” He panted, embarrassed as hell, his face flushed.

Koo got up slowly, her pussy dripping strings of arousal, lips swollen and red from the grinding. She licked her lips, satisfied. “Don’t apologize, Tae. That’s perfect—my technique is working! See? You got rock-hard and came. Progress.” Tae stared, noticing her pussy dripping down her thighs, juices glistening. In his mind, one thought echoed: My mother-in-law is a total slut. A cock-hungry whore disguised as a doctor. But damn, if it didn’t turn him on even more.