BLAIR FLEMING

"WHO was it?" Lauren asked his assistant.

His assistant quickly understood what his boss was referring to.  "It's young master Fleming."

The annoyance on Lauren's face became even more prominent after hearing that.  "You mean that obnoxious 'I'm the best' Blair?" 

The assistant nodded. 

Lauren's feeling of wanting to beat someone just intensified when it was confirmed that it was Blair Fleming who's messing with Astrid.  If it was that guy, then he's now 100% certain that this situation escalated into this because of him.  Especially if the other saw his assistant and thought that Astrid was connected to him in some way.