Any suggestions how we proceed from here?
Well, I'm not in the scene, but if you'd be interested in my suggestions anyway (feel free to entirely disregard if not)... if you wanted Julen and Karsimir to move on so they aren't stuck in this scene with no one responding to them, you could always give a really brief summary of the rest of the meeting, that it went fine, without doing too much that would define Reia's characters. The major downside to that is that Reia's role in the plot would probably essentially be finished unless something came up for her to do later.
Or something could happen that led to Julen and Karsimir being called away to deal with a pressing situation-- and they could always return to the house at a time Reia is able to post. That frees up Julen and Karsimir somewhat without removing Reia entirely from the plot. Of course, it does lead to a plot wrinkle needing to be improvised pretty fast, but I think you guys are up to it.
If you wanted to do something that didn't cut off the current scene... I don't know, really. I suppose Karsimir could always speak next, but that wouldn't totally fit right. Maybe if you made it an IC point that Reia's grandmother seemed reluctant to respond, and needed some coaxing? That way she could still jump back in the scene. But then if Reia isn't back by the next round, you'd be stuck in a worse spot conversation-wise than you are now.
After six days, I think a skip is in order so you guys don't remain stuck, but given where things are in the scene, that's really awkward. Sorry for my lack of helpfulness.
Speaking of the lost, I think Quinn is gone again. She hasn't responded to a post that's more than a month old, and I PMed her several days ago to make sure she's OK, but she hasn't checked her messages since.
I don't think it's an issue story-wise at this point unless Rail needs to use those NPCs for something else. Since it's really a side story, it doesn't necessarily have to be resolved right away. If there's no movement on it before we're ready to leave for Fain-- since I'm assuming we won't want to leave hanging plot threads in Marn, especially hanging plot threads that want to kill us
-- there may need to be some wrapping up, Quinn or no Quinn.
I point this out mainly because some of you knew I PMed Quinn, I wanted to make you aware of the (lack of) result. I thought Jules and I had reached an understanding with her about vanishing without notice last time she pulled a disappearing act-- but what can you do, I guess?
Anyway, didn't hear back, Quinn may or may not be gone for good.