A/N: Thanks for all the reviews, guys! I never thought I'd get that many for one chapter. I'm posting this next one pretty soon after the last one since I already had it written, but I'm not sure how long it'll be until I have Chapter 3 up. Just keep reading and reviewing, I appreciate all of them!

Disclaimer: I don't own Life With Derek.

When Derek heard Casey's music blasting at even louder volumes than usual, he knew something was up.

Something must have happened on Casey's date with Sam that she was less than happy about.

For some reason, this bit of information pleased Derek, possibly more than anything else had ever since he had given his okay to Casey and Sam dating.

His curiosity finally getting the best of him, Derek left the solitude of his own room and swiftly approached Casey's, barging in without bothering to knock.

For a second, Casey hadn't noticed him yet, and he gazed at her as she sat on her bed, her head in her hands, eyes staring into space, apparently lost in her own thoughts.

But as Derek closed the door behind him, Casey lifted her head, looking at him in what looked like slight annoyance. "What do you want, Derek?"

He smirked. "How did your date with Sam go?"

"Why do you want to know?" Casey snapped.

"Geez, did I strike a nerve? I'm guessing all is not well in Sammy-land."

His stepsister glared at him. "For your information, everything is perfectly fine between Sam and me."

"Then why so testy?"

Casey sighed. "And why are you in here again?"

"Can't a stepbrother ask his dear stepsister how her date went without getting questioned?"

"Look," Casey stated flatly. "My date with Sam was great. G-R-E-A-T. He picked me up, gave me flowers, told me I looked beautiful. We went out to eat, and I discovered that some boys really do know how to dine politely. Then we went to see a movie, and he didn't even object when I wanted to see a romantic comedy that most guys wouldn't like. And at the end of the perfect night he walked me to the door, and leaned in, and—"

"And…" Derek prompted, sitting down on the edge of Casey's bed. This was getting good.

"And I pulled away."

"Ohoho! Have we got something here!"

"Yeah, yeah."

"So…why, exactly, did you lose your desire to kiss dear Sammy-boy?"

"Why do you care?"

"Can't a step-brother ask—"

"Alright, alright." Casey gave in. "I didn't kiss him because…well…the truth is, I've never kissed a boy before, and—"

"Wait, wait. Am I getting this straight? The great, ever-amazing, know-it-all Casey MacDonald has absolutely no experience in the kissing department?" Derek laughed.

"Why am I telling you this again?"

"Because I have a brilliant idea that just might solve your little problem."

"Oh yeah? And just what that idea be? Or were you just not going to tell me?"

Derek made a move to leave, wanting to get under her skin. "Yeah, on second thought, that might be a good idea—" he broke off when Casey dragged him back into the room.

"Tell me." The look on her face convinced Derek that she was serious.

"Okay. You've never kissed a boy, right?"

"Right."

"And I, being as undeniably hot and sexy as I am, have kissed countless girls."

"Are you just here to gloat?"

"No—I'm not done yet. Okay. So you're a girl, I'm a boy, you have no experience, and I have lots. So what do you say to learning the subject from the master?"

"Are you saying—ew! Derek!"

"Come on, do you want to learn or not? You have to admit, it's a good plan."

"We're brother and sister!"

"Step-brother and –sister," Derek corrected her. "We're only related through our parents' marriage."

"But—"

"Come on, do you want me to teach you the fine art of kissing, or do you want it to be obvious to Sam that you don't know what you're doing?"

Finally Casey relented. "Okay. I'll do it. But I'm not going to like it."

"Sure, sure…" Derek smirked.

"So…when do we start?"

Derek moved closer to her on the bed, moving his mouth near her ear. "No reason why we can't start right now…"

Haha. I'm evil. Sorry guys. Review, and I'll try to get the next chapter out soon!