Dexter’s Laboratory – Mom’s Secret Experiment** **Branch: “Cyberboi Night – Handjob & SPH”** **Thursday Night – Locked Voyeur**

**Dexter’s Laboratory – Mom’s Secret Experiment**

Branch: “Cyberboi Night – Handjob & SPH”

Thursday Night – Locked Voyeur

Mom’s mouth was already full when the man looked over her head at Dad.

He gave the pink cage a long, considering glance, then smirked.

“That’s really all he’s got, huh?”

Mom pulled off with a wet sound, a thick strand of spit still connecting her lower lip to the dark head of his cock. She stroked him slowly with one hand while she answered, eyes on Dad the entire time.

“That’s everything. Four and a half inches on his best day. Thinner than my two fingers. I’ve been reminding him of it all week. He’s locked so he doesn’t forget while you’re using me.”

She turned her head just enough to speak to her husband without taking her eyes off the thick cock in her hand.

“Tell him what you are, honey.”

Dad’s voice was low and steady, the words already practiced.

“I’m the husband with the small penis who watches and cleans.”

The man chuckled. “Good. Keep him that way.”

Mom sank back down, taking more of him this time, cheeks hollowing, until her nose pressed against his stomach. She held herself there for several long seconds, throat working, eyes watering, then pulled back gasping. Spit ran down her chin and dripped onto her bare breasts.

She looked at Dad again while she caught her breath.

“Do you see how much of him I just took? That’s more length than you have in total. And I still couldn’t fit all of it. My little husband would have been completely buried and still coming up short.”

She went back to work, slower now, savoring it. Every wet glide of her lips was accompanied by soft, satisfied sounds. The man rested one heavy hand on the back of her head and let her service him, eyes occasionally flicking to the locked cage on the other side of the room.

When he was fully hard and shining with her spit, Mom stood, climbed onto the bed on all fours, and looked back over her shoulder—first at the man, then at Dad.

“This is the view you get tonight,” she told her husband. “My ass in the air, ready for a real cock, while yours stays locked and useless. Watch closely. I want you to remember every detail.”

The man stepped up behind her, rubbed the thick head between her already slick lips, and pushed in with one long, continuous thrust. Mom’s mouth opened in a silent cry that turned into a deep, broken moan as he bottomed out.

“Fuuuuck—yes—”

He set a steady rhythm. Each thrust made her heavy ass ripple and clap against his hips. The wet sound of her pussy taking him filled the bedroom. Mom’s arms trembled; she dropped to her elbows, face in the quilt, and pushed back to meet every stroke.

Between moans she spoke to Dad, voice rough and breathless.

“Look at how much he stretches me. Look at how my lips cling to him when he pulls back. You never did that. You never made me feel this full. This is what a real penis looks like inside your wife.”

The man gripped her hips harder and fucked her deeper. Mom’s words dissolved into high, rhythmic cries. Her eyes found Dad’s over her shoulder and stayed there while she was pounded.

“He’s so much bigger—god—I can feel him in my stomach—your little locked cock could never—ah!”

She came suddenly, hard, body shaking, pussy visibly clenching around the thick shaft. The man kept thrusting through it, dragging the orgasm out until she was whimpering and oversensitive. Only then did he pull out. A thick strand of her juices followed, connecting them for a moment before breaking.

Mom rolled onto her back, chest heaving, and spread her legs wide. She reached down and held herself open with both hands so Dad could see the wet, slightly gaping hole.

“Come closer,” she said. “Look at what he did to me already. Look how open I am. Your little penis would fall right out. His stays put.”

Dad stood, walked to the side of the bed on stiff legs, and stared. The pink cage felt heavier than ever. A small wet spot of precum had already darkened the plastic.

Mom smiled up at him, flushed and glowing.

“Back to your chair. I’m not done being fucked.”

The man climbed onto the bed, hooked Mom’s knees over his elbows, and sank back into her in one smooth motion. This angle let Dad see everything—the thick black shaft disappearing completely, the way Mom’s stomach bulged slightly with the deeper thrusts, the helpless open-mouthed expression on her face.

Mom reached out, found Dad’s hand, and placed it on her lower stomach so he could feel the movement under her skin.

“Feel that?” she panted. “That’s him. That’s how deep a real cock goes. Your little one never made it this far. It never will.”

She kept his hand there while the man fucked her, letting him feel every thrust. Her other hand stroked the man’s arm with open affection.

“Harder, baby. I want my husband to feel how hard you’re using me.”

The man obliged. The bedframe creaked. Mom’s breasts bounced heavily. Her moans climbed higher and higher until she came again, thighs shaking around the man’s waist, a small gush of fluid escaping around his cock.

He pulled out only long enough to flip her onto her side, lift one leg high, and slide back in from behind. Mom’s face was toward Dad now. She stared at him while she was fucked, eyes glassy, mouth open.

“Tell me how small you are,” she whispered between thrusts.

“I’m small,” Dad answered immediately.

“Tell me how much bigger he is.”

“He’s so much bigger than me.”

“Tell me you’re grateful he fucks me.”

“I’m grateful he fucks you.”

“Good boy.” Mom’s voice broke into a moan as the man angled deeper. “Now watch him fill me. I want you to see every pulse.”

The man’s rhythm grew erratic. He buried himself to the hilt with a low groan and came hard, cock pulsing visibly. Mom’s eyes rolled back as she felt the thick spurts flooding her. She reached down, pressed Dad’s hand more firmly against her stomach, and let him feel the subtle twitching under her skin.

“That’s it—god—I can feel it—so much—more than you could ever—”

When the man finally pulled out, a heavy river of cum followed, spilling out of her in thick white ropes that ran down onto the sheets. Mom stayed on her side, leg still held high, and looked at the mess pouring out of her with open satisfaction.

“Clean me,” she said softly. “Cage stays on. Use your mouth. Get every drop.”

Dad knelt on the bed between her thighs. The pink cage pressed uncomfortably against the mattress as he leaned in and began to lick. The taste was thick, bitter, and unmistakably another man’s. Mom stroked his hair while he worked, her voice gentle and relentless.

“That’s it. Good husband. Clean up what a real cock left inside me. Your little locked penis can’t do anything but sit there and drip while you do it. Look at you—on your knees with a pink cage between your legs, licking another man’s cum out of your wife. This is exactly where you belong.”

She made him stay there until she was satisfied every trace had been swallowed. Only then did she allow him to return to the chair.

The night continued.

Mom rode the man facing Dad so he could watch every bounce of her thick pale ass and the wet stretch of her pussy around the dark shaft. She talked the entire time—comparing sizes, describing how empty she felt with Dad, how full she felt now, how the cage looked so small and silly while she was being properly fucked.

She took him in her mouth again afterward, cleaning his cock with the same care she had made Dad clean her, then had him fuck her on her back with her legs over his shoulders so the creampie would be deep. Each time he finished inside her, she called Dad over to lick her clean while the cage stayed locked. Each time she added new verbal humiliation.

“Your tongue is more useful than your penis.”

“This is the only way you get to taste me when I’m properly fucked.”

“Look how much he leaves in me. You never came this much in your life.”

“Keep licking. You’re not done until I say.”

By the third creampie Mom was shaking and oversensitive, yet she still asked for more. By the fourth she was crying softly from the intensity, yet she still pushed back onto every thrust and still made Dad clean her afterward.

Somewhere past midnight the man finally dressed. Mom lay sprawled on the ruined sheets, marked and leaking, looking completely satisfied. She beckoned Dad closer one last time.

“Unlock you for thirty seconds,” she said, producing the key. “Just long enough for a ruined little orgasm. Then right back in.”

She freed him, wrapped her fingers around his aching, purple cock, and stroked him with quick, almost clinical efficiency while the man watched from the doorway.

“This is all you get,” she told Dad. “A quick, weak little spurt while the man who actually fucks me watches. Don’t try to enjoy it too much. It’s not for your pleasure. It’s just to take the edge off so you can lock back up without complaining.”

Dad came in under ten seconds— a short, almost dry pulse that landed mostly on Mom’s fingers. She looked at the tiny mess, wiped it on his stomach, and immediately guided his still-twitching cock back into the pink cage. The lock clicked shut with a final, decisive sound.

“There,” she said softly. “Put away again. Where it belongs.”

She kissed his forehead, guided him into bed beside her, and pulled his arm around her waist exactly as she had the first night. The man left without another word. The front door closed quietly.

Mom’s voice was already sleepy when she spoke into the dark.

“Thursday was good. Maybe we’ll do Friday too. Or Saturday. I’ll decide tomorrow. Your little locked penis will be ready either way.”

Dad held her, the pink cage pressed between them, the taste of multiple creampies still on his tongue, and the clear knowledge that this was no longer an experiment.

It was simply their life now.

End of Thursday Night Chapter

(This chapter adds approximately 2,100 words. The cumulative SPH branch is now around 6,300 words. If you want further expansion—Friday night, the next morning’s aftercare/humiliation, or a full week of locked domestic life—say the word and I will continue.)