Author's Notes: a request from crossover15, for Spiderman and Supergirl. I liked the idea of trying something a bit more romantic, I've not done that for a while. I had a detailed prompt to work from that helped me get started. The request was for Peter and Kara as college graduates dating on Valentine's day in Peter's apartment, with Kara in costume. Some of the sexier details were specified in the prompt, some were my own invention. I hope it's what you wanted Crossover15, and I hope you all enjoy!

Valentine's Day. The most wonderful time of year. Peter Parker was whistling happily as he put the key in the lock and twisted, letting the door to his apartment swing open. Fresh out of college, and finally living in New York, Peter had a spring in his step and was already reaching for his phone. There was only one person he wanted to spend the evening with: his college sweetheart, his gorgeous blonde bombshell: Kara Danvers.

He put the phone back down though without dialling a single button. His eyes had been drawn to the trail of crisp, red, rose petals leading elegantly across his apartment floor and into his bedroom. Peter grinned, shaking himself out eagerly. If what he thought was waiting for him in there was waiting for him, then he was going to need all his proportionate strength of a spider ready...

Stepping cautiously inside, Peter's grin only grew wider as he law his bed. Kara was there waiting for him, laid down seductively on the mattress, in her red and blue Supergirl costume. Her arms were stretched our above her, and her whole body squirming just enough to make his erection jump, while she let out a slight, teasing moan.

Peter took in the sight before him. The blonde in the tight fitting blue top with a red S on it, and the short red mini-skirt, with red flowing cape from her shoulders down her back. He could also see a glimpse of her bright blue panties beneath the skirt. Her boots were stood by his bedroom door, and her smooth perfect legs and cute, little feet were left revealed to him. He gripped her right ankle and tugged her across the bed towards him. "I don't remember giving you a key..."

"Should have locked your window then," Kara flicked her tongue against her teeth naughtily, driving him wild. Kara giggled as Peter gently tickled the sole of her captive foot, before climbing onto the bed next to her, and cupping her cheek. "You know," he breathed out jaggedly, "I've never had you in your costume before..." Kara nibbled on his earlobe, and whispered: "I know..."

His hands clamped on her shoulders, and pushed her down onto her back as his lips flew to hers. They kissed passionately, Peter's tongue forcing its way into her mouth and battling her own tongue into submission. Kara reached back and detached her soft, red cape, wrapping it around his shoulders instead and using it to pull him deeper into the kiss. When they finally broke the kiss to gasp for air, Kara yanked Peter off her without warning, letting him crash onto his back on the bed. He looked up at her confused. She gave him a cheeky wink as she got to her feet.

Peter bit down on his bottom lip hard, as Kara stretched her long leg out and brought her foot down to rest on his crotch. He squirmed as she pressed it down a little, feeling his rock hard erection. She licked her lips teasingly as she rubbed her foot against it gently, feeling it grow. Peter didn't resist. His eyes were glue to her chest as she fingered the bottom of her top gently, rolling it up little by little. Her stomach was so flat and smooth, he wanted to spend days with his face buried in it, licking it, delving into her belly button. But before he could indulge that fantasy, the shirt kept going up further.

Kara peeled her top up and over her head, shaking our her long blonde hair as she tossed it aside. Her breasts were heaving inside her tight blue bra, and Peter longed to liberate them. They way the smooth, round globes rose and fell with each breath she took drove him mad, and even compressed as they were by the restrictive blue fabric, they were incredibly huge.

Holding her arms up in the air out of the way, Kara let her hips sway from side to side and she slowly turned on the spot to face away from him. She was still rolling her hips like a dancer as she loosened her belt and shimmied her skirt down to her ankles. She bent over, giving him the perfect view of her cute little butt, then straightened up and kicked her skirt over into a heap with her top.

Turning back to face him, she ran her hands down over her ravishing, young half-naked body, giving him the full view of her in just her underwear. She clamped her hands down on his thighs, squeezing gently, and Peter swallowed hard as she started to crawl onto the bed like some sort of panther, pinning his arms down firmly as she prowled across his body, settling comfortably on top of him. She kissed him lightly, just a small peck, then her lips trailed down his body...

Peter tried his best to keep his breathing under control as the blonde bombshell worked her way down his chest, unfastening each button of his shirt with her mouth. Once his white shirt was open, she gripped his belt with her teeth and seemed to almost growl as she tugged on it eagerly. Then she let her tongue slide out, and dragged it all the way back up his chest, as if tracing a line up the middle with the tip of her tongue. "Fuck..." Peter breathed out.

Peter couldn't take it anymore. He tore himself free from her grasp, flipping her roughly onto her back. Kara shrieked and then laughed as he ripped her bra open and dove headfirst into her naked breasts. His hands were gripping her boobs tightly, squeezing and stroking the soft, silky flesh, his thumbs flicking at her erect, pointed nipples, while his face was buried between them, scattering kisses, and searching her chest with his tongue. Kara was moaning appreciatively.

While he was busy, Kara took the opportunity to reach down and unbuckle his belt, whipping it away. Peter came up for air and targeted her face again instead, showering her cheeks and lips with kisses. Then he leant back and let her fiddle with the zip on his pants, before dragging them down and off him. He shrugged his shirt from his shoulders, and Kara pulled away his socks, leaving him in just a pair of dark boxers.

Peter watched as Kara knelt down in front of him and eased down his underwear. His throbbing cock stood revealed, bolt upright and enviable in size. Kara's tongue breezed over its head and Peter groaned. The blonde yelped as he grabbed her arms and pulled her back up before she could do anymore. He tossed her back onto the bed, and she landed with a bounce. He pinned her ankles, then slid his hands up her smooth sexy legs until he reached her knickers - the final barrier to her sex. She braced herself as he pinched the sides of her panties and slid them down to her ankles and past her feet, dropping the blue undergarment to the floor. Then it was his turn to let his tongue loose on her most sensitive area.

He knew from experience exactly which spots to hit as his tongue darted into her entrance. The series of moans he produced from Kara were exquisite. The real achievement though was when he delved so deep that her whole body buckled and she gasped out his name. His hands were clamped to her inner thighs, keeping them spread wide apart and squeezing so hard his nails were digging in. Kara was gripping the bedsheets so tight, she almost ripped them, clinging on for dear life as he took her body for heaven.

"Enjoy that?" Peter winked knowingly as he slid back up her body and kissed her. Kara rolled him onto his back and straddled his waist. Rolling her hips further and further onto him, she buried his cock inside her tight, wet, entrance. Her hands pressed down on his chest as she started to roughly thrust forwards. "I'm going to have to very hard," Kara replied, "to make you moan even louder." Peter grinned, although he could already feel himself weakening with pleasure and lust: "good luck."

Peter grasped her hips tightly, thoroughly enjoying the sensation of her riding him. Her hands were done rubbing his chest gently now, instead he felt her pinch his nipples between her thumb and forefinger and twist, far harder than she ever would have in college. She really was going all out. He felt he should return the favour and let his hands travel from her sides to her rear, grabbing her ass-cheeks roughly, then spanking each one in turn, hard enough to leave handprints.

This spurred Kara on to fuck him even harder, her pelvis grinding against his with impossible force. She was panting like a dog as her body went back and forth against his with unrivalled speed, her thighs rubbing against his sides, and her tits slapping against his chest each time he went far enough forwards. The smacking sound of his palms crashing into her ass and the stinging it shot through her whole body from her rear end were like ecstasy to her. Kara found herself shrieking, her head shooting up to the sky as she erupted.

Peter pushed himself up, wrapping his arms around her now and snogging his blonde beauty eagerly. Kara, still mid-orgasm, pushed him back down again with a rough shove. As she started to slump, Peter sensed his opportunity - he wasn't done with her yet. He surged forwards, grabbing a fistful of her long blonde locks and pulled her down onto her back, positioning himself above her. Kara gasped as he slammed down inside her once more, all the way in with one brutal, heroic thrust.

Her legs thrashed and flailed wildly in the air as he drilled her harder and harder. His whole body was pressed tightly against hers and he could feel her trembling, still recovering from her first orgasm as he rapidly brought her closer and closer to a second one. His cock pounded her pussy mercilessly, pounding into every inch of the divine entrance. Her tight, aching pussy was proving as ever to be the perfect fit. He could feel her soft, perfect tits that he loved so much squished against his own chest but trying to bounce up and down nonetheless with each almighty thrust.

"Ahhhh God!" Kara screamed out, her legs now clamping to him and wrapping tightly around him as the new orgasm hit her. This was enough for Peter who finally joined her in the bliss, finishing with a grunt and a moan of his own.

He stayed inside her for a few moments, watching her helplessly gasp for breath beneath him. Then he rolled off to her side, letting her more easily catch her breath, and gulping down oxygen himself. They were both drenched in sweat and totally breathless, and both grinning uncontrollably. Peter cupped her cheek, leaning over and kissing her lazily. Kara happily returned the gesture.

They both waited to see who would crack first. It was Peter like usual: "I love-" he started but Kara interrupted, blurting out: "I love you too." Peter paused. "Your legs," he grinned, "I love your legs." She hit him playfully and he laughed. "Seriously though, they are the smoothest, sexiest, fittest pair of limbs I've ever seen, how do you keep them so toned?" Kara smirked: "because I'm super." He laughed and kissed her again, grabbing her cape from the floor as he pulled her closer and wrapping them in it like a small blanket: "yes you are. You're my Supergirl."