Another hotel room. Another city.

This time however, Lizzie was staying with Casey. She was on a break from college and apparently had just gone through a painful split from a boyfriend. Casey was lending a shoulder to cry on. It evicted Derek from their bed because they still hadn't told the family, but Casey was really happy to see her sister, so he was being tolerant. Well almost.

"Tell me again why we can't tell Lizzie." He said, tucking into breakfast. Lizzie was in the shower.

"Because then she'll be conflicted. I can't do that to her." Casey sipped her caffeine-free tea. "Of course, we could just go public."

"Or not."

"Are you ashamed of me?"

"Yeah. You look like a dog and you can't sing for toffee." He said with a smirk.

"Moron!"

"Lamebrain."

"Jerk!"

Derek flicked a piece of toast at her and it landed in her cleavage.

"Der-ek!" Casey said getting up and walking around the table to confront him. He caught her waist as she approached and fished the toast out with his teeth. It made Casey giggle. Derek glanced around her at Lizzie's door and then kissed a path from her breast bone down to her navel.

"You're a tease." She said to him in the breathless voice which sent him weak at the knees.

"So are you." He mumbled against her skin. "Do you have any idea what I want to do to you right now?"

"I can think of a few things." She said into his hair.

"Yeah. But I bet this wasn't one of them." He said, grabbing both her hands in one of his and starting to tickle her. Casey dropped to the floor in an attempt to get away from him, but he dropped with her and the tickling continued. Casey got a hand free and started batting at him and they rolled around on the floor, grunting.

"Oh for godsake, you two. Fighting again? You know, Mom's under the impression you'd grown up." Lizzie was standing in the doorway, hands on hips.

Derek pulled away from Casey whose bathrobe was now completely open, revealing she was naked underneath.

"Ew! Spacey. Put some clothes on. I just ate."

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"I can't believe you are really taking me out with you tonight!" Lizzie said in an excited voice. She was dressed in a figure-hugging designer number and Casey's make-up and hair team had done their work on the two women.

"Well I know that this exhibition is completely up your street as it is a commentary on recycling, so I thought we should go."

"How do you manage to get tickets for these things anyway?" Lizzie asked. Casey laughed.

"I didn't. It's invitation only."

"We are invited though?"

Derek chuckled from the other side of the room where he was fiddling with his new guitar. It had been a birthday present from Casey. He wasn't going with the girls.

"Casey doesn't need an invite. If she wants to go somewhere I just phone the organisers and ask if they have any objection to her making an appearance. They normally piss themselves in their hurry to accept."

"Seriously?"

"Seriously."

Casey shrugged. "I don't do it very often. It seems rude, even if they do want me there. Anyway, This time I didn't ask D to pull strings, I wrote to them and explained that my sister was staying with me and was very interested in the subject matter, and asked if there was any chance we could look around sometime."

"And they said yes?"

Derek answered. "No. They phoned me up and a simpering curator told me a gilt-edge invite to the opening was in the post, and would I please convey their heart-felt thanks to Miss McDonald for her condescension."

Lizzie laughed. "Well, either way. Thank you!" She kissed Casey on the cheek and then went over to kiss Derek. "See you later, D."

"Have fun!"

Casey was nearly out the door.

"What's the matter Case? Worried you'll catch something?" He shouted at her. Casey looked confused.

"If Lizzie can give me a kiss, where's the one from you?" She rolled her eyes and waddled across to him in the tight dress. Bending over so that he had a bird's eye view of her plumped up cleavage, she kissed him on the cheek.

"I'll help you out of that dress later." He whispered.

"I'll hold you to that."

He smirked and stared intently at her chest. "I'd rather you held me to those."

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No sooner had Casey gone than Jaz appeared.

"You ready?" he asked Derek.

"Yeah. I thought she would never go."

Jaz walked over to the piano and sat down. "Let's get started. How did you get on with that riff?"

"Fine. Although, not being able to practice with Casey around is limiting my practice sessions."
"You still want to do this?"

"Oh yeah. I owe her for the whole 'Nah nah' business."

"It's not an easy song to play, D."

"S'ok. I have two more months to learn it. It was the song that she won the talent show with, so if a beginner can sing it, a beginner can play it."

Jaz smirked. "What is it with you two? I know it's not sibling rivalry since you're bed-hopping."

Derek's eyes widened. Jaz laughed.

"Don't worry. Your secret is safe with me." His face grew serious. "But, you mess with her Venturi and you'll need that guitar removing from your ass."

Derek grinned. Jaz narrowed his eyes. "What's so amusing?"

"That's the first time I've been on the receiving end of a 'don't hurt Casey' threat."

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