Brennan and Booth had been waiting for 20 minutes for Jack Brithe's information to come through from the FBI so that they could track him down and question him. Feeling guilty that she had blown off Sully for lunch and intended to do so again for dinner, she rang him.

"Hello?" He answered.

"Hey Sully, it's me." Temperance said, trying to pull off perky. It didn't take.

"Oh, hi Tempy. How's the investigation going?"

"Just as complicated as always." She replied dryly.

"I tried calling you earlier, but…" He trailed off, hoping she'd hop in with a plausible explanation rather than an excuse.

"Yeah, sorry, it's been really hectic." She lied. "I'm sorry about lunch."

"It's ok." He sighed. "There's always dinner."

"And I'm sorry about dinner, too." She bit her lip, worried how he'd take it.

"What?" He almost shouted. "Why do you need to work tonight as well?"

"We have a potential suspect, Booth and I are going to Vegas to question him." Temperance explained.

"Can't Booth do that alone?" Sully argued.

Temperance stayed silent for a hesitant second. "There could be more evidence, Booth might need me –"

"I'm sure he will." Sully scoffed.

"What is that supposed to me?" Temperance asked, suddenly regretting she'd called at all.

He sighed. "Nothing. Just call me as soon as you get home, I don't care what time."

"Ok, Sully I'm –" Brennan was cut off by Booth's shouting from across the lab telling her he had the information. "I've got to go, bye."

She hung up, feeling a little guilty that she had been neglecting Sully so much over the day, but also irritated sometimes, that he was too, well, clingy.

She joined Booth as they walked over to the Jeffersonian and got into the car once more. "Here's all we need to know." He handed her a file of Jack Brithe's life. "He's staying at the Luxor in Vegas, so we'll go and question him – I'll question him – and hopefully find out whether he murdered Tony or not."

"You don't think it's this guy?" Brennan waved the file.

"Well, there's motive, Tony owed him money. Also, his card was on the body, which would suggest he did it, but then again it could have been planted. If you had murdered someone, would you leave a calling card tracing back to you? He would have to be one arrogant bastard if he had, if not, then it's probably a plant." Booth speculated.

"What about the wife though, you said she was lying?" Brennan recalled.

"I said she might be lying, Bones." He sighed. "It would just be nice to get a simple case once in a while."

"I agree, but I don't think you should put all your money on this guy at least until you've met him." Brennan advised.

It wouldn't take long to get to Vegas, not with Booth's driving anyway, but Brennan began to worry that the awkward silence would set in again if either one of them said –

"So, how's Sully?" – something like that.

"He's fine." She replied bluntly, hoping that might end the conversation.

"Nothing you want to talk about, or…" He asked, obviously feeling uncomfortable at the thought of discussing Bones' love life.

"Is there a reason you keep prying into my personal life when it's so obvious it makes you uncomfortable?" She asked, evidently a little annoyed.

He shrugged, backing off a little. "I just thought you might want to open up a little is all. You have been kinda off all day." She stayed silent, looking out the window. "Hey, if you can't tell your partner, who can you tell?" He grinned.

"Booth, it's not that I don't appreciate what you're trying to do, but I really, really, really don't want to talk about it with you." Unconsciously, she managed to make it sound personal, which is what she tried to avoid. However, either he didn't notice or he let it go.

"Ok." He replied stiffly, clearly hurt. Once again, they managed to go the rest of the journey in silence, though Brennan took comfort in the fact that neither of them could stop talking to one another for long, and that was something she was really grateful for. She couldn't imagine not speaking to Booth for too long, she'd miss his boyish grin.