Dad was sprawled in his recliner five feet away, remote in one hand, beer in the other, eyes glued to the football game blasting from the TV. The volume was cranked high enough to rattle the windows—perfect white noise for what Sophia had planned on the couch right beside him.
She'd arranged us like a filthy little secret. Mia and I were under a big throw blanket "watching the game with Dad." Sophia sat on my other side in a loose sundress, no panties, the remote for Mia's plug already in her hand under the blanket. The couch was wide enough that Dad couldn't see below our waists… but one glance sideways and he'd notice the rhythmic movement.
"Contest two-point-oh," Sophia whispered, voice barely audible under the roar of the crowd on TV. "Right here. Dad's in the same room. Whoever makes Alex cum the hardest and fastest wins. Loser has to sit in the wet spot for the rest of the game… and wear the winner's fresh creampie under their skirt when we go out for ice cream later."
Mia's eyes burned with pure bratty hate-love. She was already straddling me under the blanket, short skirt flipped up, reverse cowgirl, sinking down onto my cock in one slow, silent glide. Her pussy was soaked from the morning's kitchen island load, still creamy and sloppy. The plug buzzed on low inside her ass, making her walls flutter around every inch.
"Mine," she mouthed at Sophia, starting to ride in tiny, secret circles so the blanket barely moved. Her ass clenched with every grind, milking me while she stared straight at the TV like the perfect innocent stepsister.
Sophia didn't argue. She simply reached under the blanket, spread Mia's ass cheeks wider, and cranked the plug remote to max. Then she leaned in like she was whispering about the game and dragged her tongue along the side of my shaft where it disappeared into her stepdaughter.
Dad cheered at a touchdown. The couch shook slightly from Mia's hidden bounces. I thrust up in tiny, dangerous pumps, burying myself to the hilt while Mia bit her lip bloody to stay quiet.
"Feel that, little bro?" Mia breathed against my ear, voice trembling. "I'm gonna make you explode before halftime. Right next to Dad. My pussy's winning this one."
Sophia's hand slipped between us, fingers rubbing Mia's clit in tight, ruthless circles while she whispered coaching. "Faster, princess. Dad's not even looking. Make that cock throb. I want to feel him pulsing inside you when he cums."
The risk was insane. Dad was literally right there—close enough to smell the sex if the blanket slipped. Every tiny roll of Mia's hips made the couch cushions squeak. Every wet schlick of her dripping pussy was masked only by the announcers screaming about the game.
I was losing it fast. Mia's walls rippled around me, the plug vibrating against my cock through her, Sophia's fingers working us both. I grabbed Mia's hip under the blanket and thrust up hard once—twice—
I exploded.
Thick, heavy ropes pumped deep into Mia while the crowd roared on TV. She came with me, thighs locking, pussy spasming so hard it pushed some of my cum out around my shaft and soaked the blanket beneath us. A single fat drop landed on the leather cushion with a tiny wet sound.
Dad didn't even glance over. "Hell of a play!"
Mia lifted off just enough for Sophia to catch the overflow on her fingers and lick them clean under the blanket, eyes locked on her stepdaughter in silent victory.
But Sophia wasn't done.
The second Mia slid off, Sophia swung her leg over and sank down onto me in one smooth motion—facing Dad, sundress covering everything, riding me slow and deep right beside her husband. Her experienced pussy squeezed in those perfect rippling waves that always destroyed me.
"My turn," she mouthed, grinding her clit against my base while she pretended to cheer for the game. "Watch Mommy take the bigger load while your father sits right there."
Mia wasn't about to lose. She reached under the blanket, cupped my balls, and started massaging them while Sophia rode. Then she leaned over and whispered loud enough for both of us, "Cum in her, Alex. Flood Mom's married pussy while Dad cheers for his team. I want it leaking down her leg when we go for ice cream."
The combination—Sophia's velvet heat, Mia's fingers, Dad laughing at a commercial—pushed me over the edge again in record time. I thrust up and unloaded the second massive load of the lunchtime contest, pumping rope after rope into Sophia while she bit her lip and kept riding through it like nothing was happening.
When she finally lifted off, a thick river of my cum poured out of her and onto the couch cushion, mixing with Mia's mess. The wet spot was huge, warm, and impossible to hide.
Dad stood up and stretched. "Halftime. You kids want snacks?"
Sophia smiled sweetly, cum already starting to trickle down her inner thigh under the sundress. "We're good, honey. Just enjoying the game."
Mia slid the blanket over the evidence, but not before scooping a thick glob of mixed creampie and smearing it across her own lips like gloss.
"Draw," she whispered, eyes gleaming. "But I'm winning the ice-cream run. You're wearing both our loads under that dress, Mom."
Sophia licked her lips, tasting us, and turned the plug in Mia's ass up to max again.
"Rivalry's not over. Dad's home for one more night. Tomorrow we're doing the full marital bed rematch while he sleeps in the guest room down the hall."
Dad walked into the kitchen, completely clueless.
The blanket hid the evidence.
The couch smelled like pure sex.
And the training had never been riskier.