Works for me!
[And bristle she does. She was going to introduce you nicely Kol but now she's going to shoot you a glare.]
I've told her I have other brothers before, actually.
[And then she turns to look back at Quinn. Eventually, she'll need to fill Kol in on what the Salvatores have done and why they can't risk having other vampires in their home right now but Kol is volatile and having him try to go after them when he's weakened like he is right now wouldn't be good. So really, she's withholding information for his own good.]
This is one of my other brothers, Kol. Kol, this is my friend, Quinn. [Yes she is friends with peasants. dealwithit.gif]
Kol is one of our new arrivals in the dome, or I would have introduced you sooner.
[Considering Quinn is in the know now, the revelation of Kol as her brother probably informs the unspoken request here: he'll need an invitation to step inside.]