-Hmmmm, I feel like the tactically smart thing to do would be to go hang out somewhere else for a bit to throw them off and then make their way back to Odessa after they think they've "lost" them? 
-I imagine once the others are clear Vano will book it after them, she's not really going to be able to handle both Vaylin AND Arcann, even with Vitiate's "extra" strength or whatever hahaha 
-I would imagine Vaylin would be able to sense it at the very least, being as strong as she is in the Force! :) 

Also switching internet providers today so post from me may be delayed till after the weekend depending on how long it takes to re-activate everything! XD