Taking the elevator up, Alex felt excited and eager. It was Saturday, and she'd taken the subway over to go 'visit' Justin for the day. Mom and dad knew she was coming over -- Theresa thought it was cute, how Alex was missing her big brother.

We can spend the whole day together, and no one's going to suspect anything. She was smiling brightly, thinking about it. Everyone will just think we're a normal couple, out for the day together. She looked herself up and down quickly, making sure nothing was out of place. Alex wore a blue layered skirt, a ribbed white top that was a couple of years old and was now too tight on her, and over that a looser tank top, in a lighter blue than the skirt. She wore blue boots, and had worked a blue-and-white printed scarf into her hair to call attention to it, but no hat, knowing that Justin loved her hair.

The elevator dinged and she quickly stopped her check. Never let them see you worry about your outfit. It's all just natural. The door opened, and, seeing no one in the hallway, Alex walked quickly down to it, knocked on Justin's door with a little tappita-tappita.

A moment later, the door opened, and she smiled up at Justin, stepped forward to hug and kiss him, right there in the hall. She went up on tiptoe, leaning her head back, and opened her mouth just slightly to accept his tongue. Justin's tongue barely probed at Alex's mouth, and she met it with her own, tasted and played with him. His hand was on her waist, pressing her against him, and she arched slightly, pushing her breasts against his chest.

They broke the kiss, and Alex said, "You know, I could have been here a lot faster if you'd teach --" Just cleared his throat and threw a glance back into his room. Alex followed it, saw Beth sitting there and smoothly continued, " -- me to drive."

"What's she doing here?" Alex whispered then.

"She wanted some math help." And indeed, there were books open on the desk, and papers and pencils out.

"I'll go on and leave you two alone," Beth said, standing and starting to gather her things, closing her book and beginning to transfer things to her backpack. "Thanks for the help, Justin." She gave him a quick smile. Alex glanced her up and down, taking in the blonde girl's look. Hair, carefully brushed. Top, a little tight, with short sleeves to show extra skin. Shorts, likewise. Low-hanging necklace, to draw attention to her chest. This, Alex thought, was not a casual studying outfit.

"You're welcome," Justin answered, and Beth's smile seemed to grow wider to Alex. I can see I'm going to have to take some stronger measures here.

Two minutes later, the door shut behind Beth, and Alex turned a pout on Justin. "I don't like her. I think she's after you."

"What? Alex... nothing happened. We worked a few trigonometry problems. I explained what cosine and sine are." He reached a hand to Alex's hair, stroked across it, brought it down to her chin and tilted her face up, looked down into her eyes. "Even if she is, nothing's going to happen. I love you."

He bent his head down and kissed her quickly. "And may I say, you look even more beautiful than usual today."

"Yes I do," she answered to that. "And you'd better appreciate it. I don't go to this kind of trouble for just anyone, you know."

Smiling, Justin stroked her hair again. "Thank you for doing it for me. I love you." He brought his hands down, took both of hers, started to pull her toward the bed. "Now come here... we need to get something out of the way, so I won't be drooling over you the whole day in that outfit."

"Maybe I want you to drool." Alex gave him a coquettish look, resisted his pulling. "Maybe I want you to think about what you're going to get later all day long, so you'll want it really, really bad when we come back."

Stepping forward, Justin put an arm around his little sister and half-lifted her. She squealed at that and fought him a little, but not hard enough to actually stop him. He set her on her feet by the bed, then stepped back.

"I'm not waiting. Remember rule number two?"

"Umm...." Alex put a finger up to her lips and gave her brother an innocent look. "You're in... cognito?"

Reaching around, Justin lifted her skirt, then gave Alex a sharp smack on her butt, hard enough to sting a little. "No. Try again."

"You're in... satiable?"

Another smack. "No. Last word starts with a 'c'."

"You're in... Charleston?" Alex giggled that time, then gasped as Justin's smack came harder this time.

"No. Try again," he said, grinning at the game. He gave Alex's butt cheek a squeeze as he waited.

"You're in... charge."

"That's right." He kneaded the cheek a little more, then stepped back. "Now, take off that cute little outfit, so we don't ruin it."

"Yes, sir," she said, casting her eyes down and using a subdued tone, but smiling. She sat down and removed her boots first, then stretched out her legs, stood up and did a pirouette, letting it lift her skirt a bit. Justin still stood back, watching and smiling. Next, she removed her tank top, leaving the tighter ribbed white top on under it. Her darker bra was barely visible through it, and it clung nicely to her chest and belly.

Lowering her head, Alex watched Justin through her eyelashes as she reached down to touch the zipper of her skirt. Smiling, she took hold of the pull -- then let it go and reached back up, pulled her hair back and slowly undid the knot tying the scarf into her hair. She took her time loosening it, then slipped it out of her hair, dropped it onto the desk.

Justin watched as Alex brought her hand back to the zipper, teasingly moved it up and down, advancing it down a bit more each time, until it reached the bottom. She slid her thumb around, pushing the waistband down to the crest of her hips, then let it drop to the floor.

"Are those new?" Justin asked then, looking at the dark red panties revealed. Alex nodded with a bit of a blush, and Justin grinned. "Does Mom know you have panties like that?"

"No -- and that's not the kind of thing you should ask me while I'm stripping for you."

"Mmmm...." Justin stepped forward, reached around, ran his hand over Alex's panty-clad butt, feeling the texture of the lace. "Well, I like it. I like it a lot." He squatted down, putting his face on level with Alex's panties, loooked as he ran his hand over them again. "Or maybe I just like what's inside." He moved his hand between Alex's legs, felt her through the panties, brought his face forward and kissed her on the hip. Then he moved up, keeping his hand there, tugged her top up to expose her belly.

"Hey -- I thought I was supposed to be the one stripping me...."

"Rule two," Justin answered, then kissed his little sister's belly, kissed it again, moved a little and tongued her belly button, prompting a little squeal from her.

"That tickled!" Alex squirmed, smiling, and put a hand on the desk to steady herself. He pushed a hand under her top, cupped her breast, and licked her navel again, rubbing her through her panties as he did.

"And how does that feel?" Not waiting for an answer, Justin stood up and took Alex in his arms, placing his mouth on hers and kissing her hard. She responded enthusiastically, wrapping her arms around him in return and pressing herself against him.

Partway through, he moved his hand down between her legs again, stroked her slowly, then slipped his hand around behind her thighs and lifted Alex off her feet, still kissing her. She squealed again into the kiss, surprised, held onto Justin more tightly as he lowered her onto the bed.

He had to break the kiss to get her fully onto it, and smiled down at Alex, hovering his face over hers. "I love you," he said suddenly, and Alex blinked, feeling tears rising up.

Then she was crying, and Justin shifted his arms, hugged her. "It's okay.... Alex, it's okay. What's wrong? Did I say something wrong?"