Dawn's scream pierced the air, her face flushing crimson as she yanked her feet away from her boyfriend's throbbing cock, the slick evidence of her footjob still glistening on his shaft. "What the fuck, Mom? Emma? Get out!" she yelled, her voice cracking with a mix of humiliation and rage, her bare breasts heaving as she scrambled to cover herself on the living room couch. Her boyfriend, Mark, sat frozen in shock, his erection bobbing untouched now, precum dripping from the tip onto the floor.

Emma, standing in the doorway with their mom behind her, couldn't tear her eyes away from the scene. Her sister's boyfriend's cock looked so inviting, thick and veined, pulsing with need after Dawn's teasing strokes between her toes. Without a word, Emma stepped forward, dropping to her knees right there in front of everyone. "I can't believe this... but I have to," she murmured, her voice husky with sudden arousal, grabbing Mark's cock firmly at the base and guiding it to her lips. She engulfed the head in one smooth motion, her tongue swirling around the sensitive underside as she sucked him deep, her cheeks hollowing with the effort.

Their mom gasped but didn't move, her eyes wide in stunned silence, while Dawn's screams escalated. "Emma, stop! You can't do this in front of me!" Dawn shouted, tears of frustration welling up as she watched her sister bob her head eagerly on Mark's cock, saliva coating his length and dripping down to his balls. The sight sent conflicting waves of anger and unwanted heat through Dawn's body, her own pussy clenching despite the chaos. Mark groaned, his hands instinctively tangling in Emma's hair, hips bucking upward as the wet heat of her mouth overtook him.

Emma moaned around his cock, the vibrations sending shudders through him, her hand pumping the base while her other reached down to rub her own swelling clit through her jeans. She took him deeper, gagging slightly but pushing on, her eyes locked on Dawn's furious gaze as if challenging her. The room filled with the obscene sounds of slurping and Dawn's ongoing protests, the air thick with the scent of sex and tension.

Mark's body tensed suddenly, his cock twitching violently in Emma's mouth. "Fuck, I'm coming," he grunted, his load erupting in thick ropes that flooded Emma's throat. She swallowed greedily, some cum leaking from the corners of her lips as she milked him dry, her tongue lapping at every spurt. Dawn's screams reached a new pitch, her fists clenched in rage as she watched her sister claim what had been hers just moments ago.

Emma pulled back with a satisfied pop, licking her lips clean of the sticky mess, a trail of cum connecting her mouth to his still-hard cock. Dawn lunged forward, shoving her sister away, but the damage was done—the air crackled with unresolved lust and betrayal, Mark's cock twitching again at the sight of the feuding sisters.

Dawn shoved Emma hard to the side, sending her sister sprawling onto the carpet with a startled yelp, cum still glistening on her chin. Possessive rage burned through Dawn as she climbed onto Mark's lap right there on the couch, her bare thighs straddling his hips as she grabbed his still-hard cock and lined it up with her slick pussy. "He's mine, you fucking bitch," she snarled at Emma, her voice thick with fury and need, before sinking down in one forceful motion that buried his thick shaft deep inside her. Her inner walls clenched around him greedily, stretching to take every veined inch, and she immediately began riding him hard, hips slamming down with raw, possessive thrusts that made her breasts bounce wildly.

Mark groaned beneath her, his hands flying to grip Dawn's waist as her tight heat enveloped him, still sensitive from Emma's mouth but responding instantly to the new assault. "Dawn—fuck, yes," he gasped, bucking up to meet her furious rhythm, his cock throbbing against her pulsing pussy with each downward grind. She leaned forward, nails digging into his chest, riding him like she meant to claim every drop of him back, her clit grinding against his pubic bone with wet, slapping sounds that filled the room. The betrayal in her eyes mixed with desperate arousal, her face still flushed crimson as she glared down at him, pussy dripping around his length and coating his balls with fresh arousal.

Emma scrambled back up, wiping her mouth and watching with wide, hungry eyes as her sister claimed Mark so aggressively. "Dawn, wait—" she started, but Dawn cut her off with a sharp moan, rolling her hips in tight circles that made Mark's cockhead grind against her deepest spots. Their mom stood frozen in the doorway, one hand pressed to her mouth, but her gaze stayed locked on the way Dawn's pussy swallowed Mark's cock over and over, the obscene wet sounds and the slap of skin on skin growing louder.

Dawn's fury fueled every bounce, her thighs flexing as she rode him harder, faster, her pussy squeezing rhythmically around his shaft as if trying to milk him dry on her terms alone. "You don't get to touch him," she hissed at Emma, even as her own body betrayed her with waves of unwanted pleasure, nipples tight and aching, heat coiling low in her belly. Mark's hands slid up to cup her breasts, thumbs brushing her nipples, and she cried out, slamming down harder so his cock plunged deeper, stretching her, filling her completely while the couch creaked beneath them.

Emma crawled closer anyway, one hand slipping back between her own legs to rub her swollen clit through her jeans, the air still thick with the mingled scents of sex and tension. Their mom took a shaky step forward but said nothing, her cheeks pink as she witnessed Dawn's raw, possessive claiming. Mark's hips snapped upward to match Dawn's pace, his cock twitching inside her as she leaned down to bite at his shoulder, pussy clenching tighter with every thrust.

The rhythm built relentlessly, Dawn's fury turning into desperate, grinding need as she rode him toward the edge, her juices slicking his entire length and dripping onto the cushions. Mark's grip tightened, pulling her down harder onto his cock, and the room echoed with her moans of rage-laced pleasure, the sisters' eyes locked in silent challenge even as their shared desire thickened the charged atmosphere around them.

Double troubled