Author's Note: I am so ecstatic at the reviews you all have left. I appreciate every kind word and am only mildly afraid of constructive criticisms :). I am going to continue this story along with a vague idea of what happens next. Confession time: I see much of my own relationship with Casey and Derek. No, not step-siblings, just their connection. The club scene with the drunken dancing and then kissing… yeah, that actually happened to us. Extra fun fact is that I was his boss at the time :P ANYWAY! Onto the main event. P.S. thank you Guest88 for letting me know about the typos :)

"So, the glory of the stage wasn't all that in the end?" Lizzy assumed as she carefully packed Casey's dishware into the appropriately labeled boxes. Marti was on bathroom duty, and Nora was working on linens while Casey was backing her clothes and shoes. Casey's announcement to leave New York and go back to school for business with a minor in dance was warmly welcomed. Nora admitted that she was selfishly glad that Casey would only be a few hours away by car instead of a plane ride away. Marti was more curious about what happened. The now ten-year-old went through Casey's bathroom with precision to see if there was any clue her step-sister was hiding.

"Did Jessie do something stupid?" Marti asked from her perch on the bathtub. Casey gave a short laugh.

"No, he didn't. Even if he did, it doesn't matter. We broke up months ago. He was just a summer romance." Casey said with a reassuring smile. Marti narrowed her eyes, not entirely convinced. Casey desperately wanted to change the subject, so she moved to Lizzie, who was tapping up the last kitchen box.

"So, speaking of summer romances. Have you heard from Oscar, Lizzie?" Casey asked abruptly; Lizzie slipped and cut off a much longer piece of tape than was needed. She glared at her older sister, who mouthed 'sorry' to the now blushing teen. Lizzie cleared her throat.

"Oscar lives in Parkhill, and we have a date over at the skatepark over there. He is going to teach me to skateboard." Lizzie said and quickly picked up the box and scurried off downstairs to the car. Marti came out of the bathroom with her box and a confused expression.

"But Lizzie already knows how to skateboard. She taught Edwin and me," Marti said, and Nora giggled and took Marti in a light hug.

"Yes, but Oscar doesn't know that," Nora said with a smile, and Marti shrugged, still not understanding but not invested enough to keep asking. Casey, Nora, and Marti went downstairs for the last time and finished packing the moving truck. Casey would fly back with the girls, and after a weekend at home, she would go to Queens to start the Summer semester.

Normally Casey loved falling asleep on long flights, but her heart was beating too fast for her to relax. Derek had left New York from his short trip to see Casey two weeks ago, and they were still 'Winging it,' so to speak. They talked nearly every night, more or less the usual banter and teasing, but there was something else there. It was impossible to tell how the family would react to the eldest step-siblings 'winging it,' so they had both agreed not to say anything until they were sure. Casey was relieved she could convince Nora and George that she could live by herself in a dorm instead of in an apartment with Derek. They were afraid of her being alone, but she quickly reminded them that she had lived alone in another country for six months and did just fine.

Besides, the idea of them living together so soon after they...they kissed. Casey absentmindedly touched her lips in the memory of those hot at heavy sessions at the club and in her room. She unconsciously clenched her thighs together. They didn't move past the over clothing caresses and kissing. Casey had tried having sex with Jessie, and by tried, she means tried to go for longer than a few seconds because it was just too painful. Jessie wouldn't pressure her to go any further than she was willing, but coincidentally after the third time they tried having sex with no success, Jessie came over to say things were not working out.

Casey had been relieved, but now what? Derek, Casey imagined, had a lucrative sex life in university, and now that they were... whatever they were. How could she tell him that sex was so painful for her?

"Casey. Your cuticles are bleeding." Lizzie said, snapping Casey out of her intense thoughts. She had been peeling the excess skin at her cuticle, and sure enough, little garnet bubbles of blood had appeared around her nails. Casey quickly wrapped her especially mutilated middle finger in a napkin and applied pressure.

"What's wrong?" Lizzie asked and then peered over to the aisle across from them where Marti and Nora seemed to be sound asleep. "It's just me. You can tell me, and then it could make up for totally throwing me under the bus earlier." Lizzie teased and poked at Casey's side. Casey gave her little sister a guilty smile.

"Sorry again about that," Casey sighed and contemplated telling Lizzie everything. Her little sister was extremely mature for her age, but she adored Derek like a blood brother, and Casey knew that this would be jarring even if Lizzie acted supportively. Casey decided on half-truths.

"I am nervous about having sex," Casey whispered, and Lizzie furrowed her brows.

"But you and Jessie never?" Lizzie asked, and Casey let out a heavy sigh.

"We tried, but it was just too painful," Casey admitted, and then Lizzie shook her head.

"From what I have researched, sex is not supposed to hurt. You are not really even supposed to bleed because of your 'broken hymen.' If it hurts that much, he is doing it wrong." Lizzie explained, and Casey couldn't help but smile at her sister. Of course, she researched sex. A quick flush of panic ran through Casey, and she looked at her baby, 14-year-old sister. Had she already had sex? Lizzie laughed at her expression.

"Relax, I haven't had sex yet. Not really interested yet, but I have plenty of condoms when I am ready, and I will make sure I have mom or George take me to get the pill. Casey stared at Lizzie, quite impressed.

"Have you told Nora and George about your well-calculated plan? And where did you get condoms?" Casey was trying to keep her volume down not to alert the other plane passengers. Lizzie shrugged.

"George kept having to leave the conversation to go outside and get some air, but mom was glad I am being responsible, and I got the condoms from Edwin," Lizzie explained. Casey had a brief moment to imagine sweet George trying to compose himself at the idea of his stepdaughter having sex. Casey was sure that he would need therapy after Marti hit puberty.

"And where did Edwin get condoms?" Casey asked incredulously and then realized at the same that Lizzie said

"Derek," they both said in unison. Maybe it was naive, but Casey, the thought of her little siblings being open to the idea of having sex made her queasy. Casey's finger stopped bleeding, and she tucked the bloody napkin into her now empty bag of pretzels.

"Don't worry, things will happen naturally, and now if you want to bail, you can use Derek as an excuse," Lizzie tried to reassure. Unfortunately, her timing was awful, and Casey choked on her water that she had been drinking. Lizzie smacked her back hard, and a few curious passengers turned to check on the commotion. Casey finally regained the ability to breathe and nervously laughed at Lizzie.

"And what would Derek do?" She asked, trying not to sound shrill. Lizzie smiled at her sister.

"Oh well, he can play the role of overly protective brother," Lizzie said but then tilted her head in thought. "I mean, he wouldn't do it for free" She laughed. Casey gave Lizzie a small smile and let out a deep breath, and continued to look out the window. Maybe she was getting ahead of herself. She and Derek hadn't even been on an official date yet. Sure they had gone to eat in the city and run around central park and even went to an amusement park but had those counted as dates? I mean, they held hands through the corn maze, but Derek insisted it was because he didn't feel like chasing after her when she inevitably got lost.

Casey smiled at the memories. Something else that made her chest flutter was waking up next to Derek. She missed being held while she fell asleep, but it's not like they could do that right away at university. There were rules. Weren't there?

Edwin had just passed his driver's license and was glad to volunteer to pick them up at the airport. He had seemed to have grown several centimeters in the six months Casey had been away and now was slightly taller than her.

"Edwin, look at you!" Casey said as she attacked him in a bear hug. Edwin grinned and twirled so she could see his new and improved preppy wardrobe too. His jeans seemed uncomfortably tight, and his polo was maybe a bit snug, but his face was losing its baby softness, and he had a ghost of a mustache on his upper lip.

"I know, your little brother Edwino is all grown up and looking cool," He said, and Casey couldn't help pinching his cheek.

"Aww, you are so cute." She said, and he shrugged off her pinching.

"Casey, cute isn't cool. I am a man now." Edwin protested. Marti laughed as she passed her brother.

"Really, you're a man now. Why didn't we get the memo." She snickered, and Lizzie laughed as she went into the backseat to join Marti. Nora squeezed Edwin's shoulder reassuringly.

"Aw, don't listen to them, Edwin. We know you are a man, and speaking of which, we can start talking about when you can pay for your car insurance," Nora said, and Edwin gulped. Casey road in the back with the girls and Nora road shotgun. They were all talking animatedly, talking about school, Simon, and generally anything in the neighborhood. Casey was excited to see Emily. They had coordinated to see each other the next evening. Casey was hoping to talk to Emily about her and Derek, just to be able to talk to someone for advice. Emily and Derek broke up a week after graduation; things just seemed a bit forced. After having a crush on someone for so long, it was hard not to be crushed by the heavy expectation of a perfect ending. Emily actually was discovering a newer side of her sexuality and actually had a steady girlfriend, Ruby.

The house came into view, and before she could get swept up in the nostalgia, her heart dropped to her toes at the sight of the prince in the driveway.

"Wait. Why is Derek here? He isn't supposed to pick me up until Sunday?" Casey asked in a loud and almost shrill voice. Nora sighed.

"He was able to come down for the weekend. Isn't this great, Casey? The whole family gets to spend time together before you both go off to University. So, try to be civil, please." Nora pleased, and Casey sighed and nodded to her mother. George came out with a crying Simon. Casey had been right on her assumption that he had doubled in size. Poor George looked exhausted but smiled at his eldest step-daughter warmly nonetheless.

"Casey, it's great to see you," He said, and Casey hugged him and reached for Simon. The baby was pink-cheeked and bundled in a light green onesie. Casey started cooing at little Simon and rocking him lightly.

"Careful, he just projectile vomited on Derek," George warned after he kissed Nora. Casey chuckled.

"Knowing Derek, he probably deserved it," Casey said with the same cooing voice. She was surprised at how quickly the jeer came to her. Old habits, she guessed.

"Well, he is taking a shower now, so you'll have some time to get settled before you two go at each other's throats," George said and took her dance bag from her shoulder. Casey thanked him and went to sit on the couch.

"Oh hey, Casey, I hope you don't mind. We had to do a little room rearrangement with both you and Derek gone. We moved Edwin into Derek's room and Simon into his old room, and yours into a guest bedroom, so If you don't mind sharing the space with Derek's things. While you're here." Nora said and then clarified after seeing Casey's wide eyes. "Just his things; he will be taking the couch at night." Casey might have a nervous breakdown before the end of the weekend.

Simon started reaching out his tiny pale fists towards Nora, who happily collected her baby. Lizzie dragged Casey up to show her how she redecorated her room, and such was the process for the other two Venturi children. Casey retreated into her old room, now a guest bedroom, and exhaled against the door. She assessed the room. Gone were her ballet trophies and academic achievement awards. Now there was a pale yellow walled, neutral sandalwood furnished and fluffy white carpeted room. Derek's battered duffle bag was on the cream-covered bed. Casey swallowed thickly and thought back to her conversation on the plane with Lizzie. Derek had given condoms to Edwin. Did he pack any for this weekend? Was he expecting something to happen in their parents' home? She had only just begun to unzip the bag when a voice came up behind her.

"Snooping, Case?" Casey shuddered at Derek's warm breath on the back of her neck. Casey jumped and reflexively swung a pillow at Derek.

"Der-rek, you scared me." She shouted and then took an extra step back when she realized that he was shirtless and slightly damp from the shower. Derek had always been lean, but there was a new indent of muscles, especially at the v of his hips from piling more hours at the rink in university, and Casey forced her eyes to stay now lower than his collar bones.

"Yeah, but you were still snooping. What's up Casey, you seem a bit flushed?" He said with a level of sarcastic concern; he couldn't keep the mischief out of his dark eyes. Casey kept her chin held high.

"I just wanted to make sure you didn't bring anything inappropriate that the kids could find, like how you gave Edwin condoms. He is fifteen, Derek," She said hotly. Derek caught on to her real question.

"Well, he's at that age where it's better to be safe than sorry, and though he is not as in with the ladies as I was, it's part of being a big brother," He said and took another step towards her. Casey was already leaning against the nightstand. She could retreat no further. "But don't worry, I wasn't expecting anything this weekend," He reassured and then smirked. "And in our parents' home no less, for shame, Macdonald." He teased and cupped her chin once she let out a relieved exhale.

"Oh, shut up. I just wanted to make sure you didn't have any ill intentions." She said but leaned into his touch nonetheless. She quickly glanced at the door. Thankfully she had thought to lock it. Derek followed her gaze, and with the minor level of privacy, he leaned down and kissed her pouty lips. Casey sank into the kiss; his wet curls brushed her forehead and ran her cool fingers down the side of his face. Derek's hands roamed up and down her sides, occasionally dropping to squeeze her outer thighs. The feeling made Casey release a shuddering gasp. Derek moved both hands to her face and kissed her firmly before breaking away.

"Think you can hold off with just that for now, Case?" He asked, a bit breathless. Casey looked up into his eyes and saw the restraint he was using, so she offered a small smile and let the tips of her fingers whisper down his torso and then stop at his jeans' waistband. Derek bit back a grunt.

"Sure thing, Der," Casey said and turned to head downstairs. When she didn't hear his footsteps trailing her, she saw him with his back facing her and his hands resting on his hips. "You coming?" She asked

"Mhmm, Just give me a minute," He said, and Casey bit back her giggle. Derek let out a breath.

"Oh, don't worry, Princess. I'll pay you back."

Next day

"I'm sorry, run that by me again. You and Derek?" Emily asked for the third time. They were at Smelly Nelly's, and Casey was picking at her salad.

"Sorta. It's just something that happened all of a sudden when he came down to New York. Now I just keep getting all flustered around him and even the thought of him." Casey explained and then gave up on her salad altogether with a groan and holding her head in her hands. "Pathetic, huh."

"Well..." In a high-pitched voice, Emily caused Casey's head to look up and give her best friend a desperate look.

"Emily! I am in a delicate state right now." She complained, and Emily giggled at her friend's antics. Same old Casey.

"Casey, I am your best friend, and so it is my solemn sworn duty to inform you that this is not all of a sudden," Emily indicated with outstretched hands. "You two have had this intense chemistry that you both were too stubborn and thankfully young to understand. I had my suspicions, but I didn't want to jump the gun before you told me and inadvertently caused you to blow it out of proportion." Emily explained and then took a sip of her mint tea. Casey was in open-mouthed shock.

"I don't blow things out of proportion." Casey protested. Emily pursed her lips into a knowing smile. Casey waved it off.

"I mean, this is wrong, right? He is my stepbrother; we've known each other since we were fifteen," Casey whispered. Emily sighed.

"It's not conventional, that's for sure, but as you said, you were fifteen when you met. You didn't necessarily grow up together like Edwin, Lizzie, and Marti have. Have you guys talked about it?" Emily asked. Casey nodded.

"We have; since we don't really know where this will lead, we didn't want to get everyone at home involved, especially the kids," Casey explained, and Emily nodded in agreement and then reached out to hold Casey's hand.

"Casey MacDonald, you are stuck in your very own version of 'Clueless.'" She teased; Casey couldn't help but laugh at that. She conjured up her best Cher impression.

"As if! Derek wishes he were Pual Rudd."

The weekend hadn't been such agony to get through as Casey had predicted. Thankfully with so many people in the house, it was easy to slip a gaze or two, and hand grazes without being noticed. All things carried on well until Sunday breakfast.

"Okay, Derek, now that Casey is going to school with you, be sure to look after her," George said before shoveling down some eggs. Derek was across from Casey at the table and gave a nonchalant shrug.

"I'm pretty sure Casey can take care of herself." He said through a mouthful of bacon.

"For once, you're right, Derek," Casey said with as much bite she could muster. "I will be fine, George, and I didn't need Derek to save me in New York. I don't need him to save me in Queens." She said proudly and continued to eat her avocado toast.

"I didn't know you went to see Casey in New York, Derek," George said, and Casey almost choked. Derek gave Casey a leveled look that read, 'Way to go, Space Case.'

"I take it back; Casey needs all the help she can get. She called whining about everyone being so mean to her, so I took pity and flew in." Derek said a nudged Edwin. "The theater girls were hoooot," and the brothers shared a chuckle. Lizzie made a disgusted sound, and Casey tried to keep the burning blush from rising from her chest.

"I should have let them rip you apart." She snapped. Derek rolled his eyes.

"Please, unlike you. I can handle a few catty girls." He said, and Casey chucked an apple at his head, he easily ducked, but Marti wasn't so lucky.

"Oww, Casey!" She shouted.

"Oh, I am so sorry, Marti." She said, and her stepsister grumbled by something along the lines of 'quit flirting.' Only Derek was close enough to hear, and he froze.

"What was that, Smarti?" He said, and she looked up at her brother, and her dark blue eyes said that she knew far more than they were letting on. Derek frowned at her; when did Marti start rebelling against Derek? Mari batted her lashes at him and smiled.

"Oh nothing, Smerek. I am just going to miss you and Casey when you go away." She said and threw her arms around Derek's neck and whispered so low that only he could hear. "I know."