Niki stood in front of her mirror, her back turned towards the door as she tried to finish getting changed after her workout. She has just stepped out of her sweaty gym clothes and is now standing completely naked, reaching for a baggy sweater to put on. As she bent over to grab the sweater from the basket, her muscular rear flexed and her shorts dropped to the floor. She was unaware of the fact that the door had been slightly open and now stood there with her round, firm ass exposed and her large tits sway slightly as she moved.

"Huh?" she asked, looking over her shoulder as he stepped into the room. "Oh, hi..." She finished pulling on the sweater and turned around to face him fully. "It was fine...you know me, I always work out. What about you? Didn't expect you home so early." She crossed her arms under her large breasts, leaning against the counter as she waited for his answer.

She raised an eyebrow at his answer, "Oh yeah? Well... I guess that's good. Glad you're not spending your time out getting into trouble." She glanced down at the floor before looking back up at him, "You know if you ever want to work out with me, I wouldn't mind having some company." She offered a small smile, trying to sound more inviting than she usually did.

Niki didn't really like ALEX and was never nice to him; he could be annoying sometimes, but he wasn't the worst either. They had been step siblings for almost a year now and it had yet to get any better between them. Maybe this time would be different though...maybe if she showed some kindness, things might change for the better.

She smiled wider at his comment. "Well then...I guess we'll just have to make the most out of it, huh?" She pushed herself off the counter and held her hands up in a mock-surrender motion. "Come on, don't be shy! Let's go work out together!" Her competitive side began to show, already thinking about ways they could challenge each other while exercising. Maybe this wouldn't be so bad after all...

"Okay...sure..." She smiled slightly as he took her by the waist and led her towards one of the beds. "Whatever you want..." Her heart raced a little faster in anticipation; this wasn't what she expected from working out with ALEX tonight but it could be fun nonetheless...She laid down on the bed, her muscular arms resting above her head as she watched him move around and dim the lights.

As the room darkened, she watched as he got into bed beside her, his muscular frame looking just as impressive in the dim light as hers did. "So..." She cleared her throat. "What do you have in mind for us tonight?" Her fingers lazily brushed over one of her large breasts; ALEX didn't seem to be in the mood for traditional exercising after all, but whatever he wanted was fine by her.

She let out a soft laugh as he caressed her breast. "Well..." She stretched languidly beneath the covers. "I was thinking we could maybe...see who can give the better lap dance?" Her voice held an amused tease, hoping to get a rise out of him with her suggestion.

She arched her back slightly, presenting herself to him as she waited for his answer. She knew that ALEX liked to be dominated sometimes; maybe this would make him more comfortable working out with her...or maybe not. It was worth a shot either way.

She laughed softly before sitting up and then slowly straddling his waist; her large breasts brushing against his bare chest as she did so. "You sure you're ready for this?" She arched an eyebrow, still teasing him even though she was beginning to wonder if he really meant it when he suggested lap dancing.

With a sudden grin, she leaned forward and began to dance for him, moving her hips in a sensual way that made her muscular ass sway enticingly. She placed her hands on either side of his head, using them as leverage to thrust herself down onto him harder with each movement. His cock was already growing beneath the covers, and she could feel it pressing against her naked inner thigh as she danced for him.

She knew ALEX liked her body; he'd made comments before about how sexy she was, but this...this

ALEX reached up and grabbed her hips, pulling her closer still; his hard cock pressed against the soft folds of skin between her legs with every movement. She gasped as he suddenly buried his face in her neck, biting down on a tendon there before sucking roughly at the skin before moving lower and taking one of her nipples into his mouth. She cried out, arching her back even further, pressing herself deeper onto him as she rode his cock through the covers. She threw her head back and let out another moan as he began to nibble and suck on her sensitive skin while his other hand slid up her body to cup one of her breasts, tweaking and pinching at the nipple until she thought she would come right there.

Her thighs trembled with effort and desire; this was better than any lap dance she'd ever given before. With

She moaned loudly as he continued to thrust slowly but surely into her, his movements driving her wild with desire. She leaned forward, bracing herself on shaky arms as she ground herself down onto him harder, her muscular ass flexing and squeezing his cock with every movement. "Oh fuck..." Her voice came out strangled and breathless between moans and groans. She wanted this...she needed it. His touch sent waves of pleasure coursing through her entire body; she could feel herself growing closer to the edge with each thrust. Her hips began to move in a more erratic motion, mirroring his movements as they fucked on the bed beneath the covers. Sweat beaded at her hairline and trickled down her spine, pooling between her shoulder blades where it would surely make an uncomfortable cold spot once they stopped...if they ever did.

Her breath coming in quick little gasps, she arched her back even further, pressing herself down onto his throbbing length as he nibbled on her neck and sucked at the skin there. "Ah...ALEX..." She moaned softly, feeling the familiar ache building deep within her core. He was making her lose control; she could feel herself spiraling closer to the edge with every movement, every touch. Her hips moved even faster now, riding his cock harder and deeper as they fucked beneath the covers in the darkened room. The sounds of their bodies moving together filled the air: the slap of skin against skin; the wet sound of her folds enveloping him; her ragged breaths and soft moans that echoed off the walls. She couldn't help but wonder if this was what he meant by 'company', or maybe she had misinterpreted his intentions

Her breath came out shaky and ragged as she leaned down, capturing his mouth with hers in a desperate kiss. She arched her back higher, pressing herself deeper onto him; their naked bodies sliding against each other as they moved together in a frenzy of need and lust. Her hands tangled in his hair, holding him close as she continued to taste and explore his mouth with hers. As he thrust harder, driving himself deeper inside her, she cried out his name, her nails digging into his shoulders as she felt the familiar tension building within her. With a shuddering gasp, her body tightened around him and she cried out in release, her muscles clenching and pulsing around his cock as wave after wave of pleasure washed over her. Her head fell back against the pillow with a moan; her entire body tingling from the sensations coursing through

Her body quaked with aftershocks as she slowly regained her senses; the sweat that coated her skin cooling and making her shiver slightly against the sheets beneath them. Her chest rose and fell quickly, each breath seemingly more labored than the last as she tried to catch her breath. She looked up at ALEX, her eyes hazy with desire as he slowly pulled out of her; his spent cock gleaming in the dim light. "Wow..." She breathed shakily, swallowing hard against the ache in her throat. She couldn't remember ever having sex like that before...with anyone. It had been unlike anything she could have imagined.

She slowly pulled the covers up over them, feeling oddly close to him even though they weren't really that fond of each other most of the time. For once, it had been nice to work out with someone; to share

Their bodies pressed together like that...it had been nice to not feel so alone while working out. Maybe they could do this again sometime, just the two of them. It would be different if it were with someone else...someone who wasn't her step brother. The thought made her smile slightly in the dim light before she closed her eyes and drifted off to sleep, her muscles still tired from their impromptu workout and lovemaking session.

As she dreamed of the night's events, a contented feeling settled over her; for once, she didn't mind being in bed with ALEX...not as long as they could do this again sometime soon.