Isabelle Lightwood yawned. She was exhausted. The night had been demanding both physically and mentally. But she needed to know. Now. She went to the weapons room to disarm and disarmour. After she was free of the slightly restraining leather she bounded toward the library. She ran into the room and stopped, panting, and took in her surroundings.

Shit.

"ISABELLE LIGHTWOOD. WHERE HAVE YOU BEEN?"

She winced. Fantastic. Not only was her brother up, but he had the entire entourage backing him. This was soo not what she needed right now. What she needed was a hot bath with some tea or maybe cocoa. She snapped back to reality as her brother's shrill voice pierced her ears.

"-irresponsible. So worried! You can't keep going like this!"

Isabelle blinked. "Like what?"

Jace stepped forward, scowling. "Izzy, you go out every night. You don't come home until 4 most nights. We're worried," he said as his voice softened.

Alec continued, "The partying has to stop."

Isabelle willed herself not to scream before she replied. "Alec, Jace. I appreciate your brotherly concern but it's not necessary. REALLY," she added as her brothers opened their mouths to argue. "And I haven't been partying. I was...er..."

Magnus shifted uncomfortably on the couch. "Bells, come on. We all know you've been partying it up. A bunch of contacts have told me they've seen you at all the clubs. And leaving with different guys. Not to mention you reek of booze."

She felt sick. "Magnus, I thought you were better than that." Glaring at her brother, she yelled, "And Alec, using your boyfriend to spy on me?"

Clary looked flustered, but spoke none the less. "Iz, we're just concerned."

Alec looked straight at her, knowing she could never look into anyone's eyes and lie. "Is this because of the break up? Are you lonely?"

Isabelle couldn't take it anymore. The research would have to wait until morning. With a final string of obscenities that made even Jace cringe, she strode out of the room.

Magnus looked at Alex. "Well, that went well, considering."

Alec put hand over his mouth in that way that stressed people do when they're trying not to sigh. He and Jace would get to the bottom of this, whether Izzy killed them or not.