Author's Notes: The first part of my new Cassie Sandsmark trilogy. I'm picturing them from near the end of the YJ comics run.

The kiss was electric. Alone in the Young Justice locker rooms. Cassie Sandsmaek felt a jolt of desire shoot through her body as Superboy's lips pressed against hers. She kissed him back, her hands reaching up to tangle in his hair.

Connor broke the kiss, but he didn't move away. He looked into Cassie's eyes, his own full of desire. "I want you, Cassie," he said, his voice barely above a whisper.

Cassie felt a shiver run down her spine. She wanted him too. She nodded, unable to find her voice.

Connor reached out and unzipped her jeans, pushing them down her hips. Cassie stepped out of them, her heart pounding in her chest. His hand slid into her panties, rubbing her crotch through the fabric.

Cassie moaned, her head falling back as Superboy's fingers found her clit. He rubbed her gently, teasing her until she was writhing with pleasure.

Connor pushed her panties aside and slid a finger inside her, making her gasp with pleasure. He added a second finger, fucking her slowly as he kissed her neck and shoulders.

Cassie reached down and started unbuttoning his costume, her fingers trembling with desire. She pushed it down, revealing his muscular chest and abs. She ran her hands over his body, feeling the heat radiating from him.

The teenage boy growled, his fingers moving faster inside her. Cassie felt her orgasm building, her body tensing as she approached the edge.

Connor pulled his fingers out of her and stood up, pushing her back against the lockers. He pulled down his costume, freeing his cock. Cassie reached down and stroked it, feeling it twitch in her hand.

The boy of steel grabbed her thighs and lifted her up, impaling her on his cock. Cassie moaned, her head falling back as he started fucking her.

Superboy's thrusts were hard and fast, each one sending a jolt of pleasure through Cassie's young body. She wrapped her legs around his waist, holding on as he fucked her.

Superboy was fucking Wondergirl hard against the lockers. Her back arched in a way that let him get as deep as he wanted. He held her hands above her head with one of his, while the other was on her hip pulling her into him.

Her breasts bounced with every thrust. The black vest she wore barely contained them, and he wanted nothing more than to rip it off her. But she was a lady and deserved to be treated like one, even in the heat of the moment.

So he kissed her shoulders and neck instead, while rolling up her vest to get to her tits. She moaned as he finally reached them and started massaging them gently.

He knew she liked it when he played with her nipples, and he wasn't wrong. She moaned louder and started grinding her hips into him. He let go of her hands to grab her ass and pull her even closer.

Her pussy felt so good around his cock. It was wet and tight, just the way he liked it. He could feel her walls tightening around him as she got closer to her orgasm.

She bit her lip and closed her eyes, focusing on the feeling of him inside her. He leaned in and kissed her, their tongues intertwining in a passionate dance.

She tightened her legs' grip around his waist, pulling him even deeper inside her. He groaned into her mouth as he felt her pussy clench around him.

He broke the kiss and looked into her eyes. "Cum for me, baby," he whispered.

She moaned and nodded, unable to speak. He could feel her getting closer and closer. He started thrusting into her harder and faster, making her moan louder and louder.

And then she was cumming. Her pussy clenched around him so tightly that he thought he was going to cum too. But he held on, wanting to make her cum again.

She rode out her orgasm, her body shaking with pleasure. He kept thrusting into her, wanting to make her cum again and again.

And then she was cumming again. This time, he couldn't hold on any longer. He groaned and filled her pussy with his cum, feeling her walls milking him for every last drop.
They stayed like that for a moment, their bodies still connected. He kissed her forehead and then pulled out of her.

The blonde slumped to the floor, spent and exhausted. She ran a hand through her now tangled hair as she exhaled. He kissed her gently. She smiled. Her very own boy of steel whenever she wanted him. She could get used to this…