Nick had been out of sorts all night. He had been in a good mood when he had arrived at the beginning of shift, but after overhearing Sara talk in her sleep and having her bite his head off, he was in a crappy mood. She was pissed off at him, and he hadn't done anything.

Catherine could tell something was up, but she didn't want to press. However, after the third time she'd asked a question without eliciting a response from him, she decided she'd better. "Earth to Nick."

Nick's head snapped up and he looked at Catherine, "What?"

Catherine cocked her eyebrow at him, "Nick, I've asked you the same question three times, what's going on?"

Nick swore under his breath, "Nothing."

Catherine chuckled, "Nick, don't pull that on me. I'm a mom, I can see through a smoke screen a mile a way. Spill it."

Nick let out a sigh and a small lopsided grin formed on his face. Catherine was one of his favorite people. She had stood in his corner a number of times when it counted and he valued her opinion. He felt bad that he hadn't paid attention to what she'd been asking. He decided he might as well tell her what had happened earlier even if he didn't quite understand it. "Sara's pissed off at me and I didn't do anything."

Catherine took in this piece of information and slowly digested it. Nick didn't usually let something like that distract him this much, "Then how do you know she's pissed off at you?"

Nick tried to restrain a smile, "I overheard her talking in her sleep in the break room."

Catherine raised a curious eyebrow, "What exactly did she say?"

A smile overtook Nick's face, "My name."

A smile spread over Catherine's face, "And from that you think she's pissed at you?"

Nick shook his head, "Cath, it was the way she said my name."

Catherine laughed, "So she sounded like she was pissed at you when she said your name?"

"Not exactly." Nick looked sheepish.

Catherine's curiosity was piqued, "Just how did she say your name?"

Nick cleared his throat, "Let's just say I was starting to feel a little jealous of the pillow she was holding onto."

Catherine tried to restrain the smile on her face, "So Sara's having some hot dreams about you."

An embarrassed grin spread across Nick's face, "Something like that."

"So how does she know you overheard her?" Catherine's eyebrow was raised.

"Warrick." Nick stated his hands on his hips. "I left the break room before she woke up. I didn't want to embarrass her. Warrick somehow told her I overheard. I was standing in the locker room and she ran in there and threw up in the trash can. Then she practically bit my head off when I asked her if she was ok."

A look of concern crossed Catherine's face, "She threw up?"

Nick nodded, "She said she wasn't sick."

"But she threw up." Catherine contemplated the information. "Maybe she's pregnant." Catherine looked over at Nick.

He raised his hands in protest, "Hey, don't look at me. I haven't touched Sara, at least outside of my, I mean her dreams."

A devilish grin crossed Catherine's face, "You like her."

Nick knew he couldn't hide it from Catherine. A grin spread across his face, "Guilty."

"So talk to her." Catherine stated obviously.

Nick let out a sigh, "Yeah, I will. She's going to kill me, but I will."