At the moment, she's only going to the archway.  She's going to get a better look at the situation, then see if she can sneak up and take out one or maybe the both of them before they even realize she's there, or at least antagonize them into fucking -- I mean following her out into the waiting arms of the rest of the party.<br/><br/>Damn plot holes.   Just love being able to see what's coming and know it and it just slip out while trying to say something else.