User blog comment:Perry!/Proof everyone joins Sibuna in the Season Finale./@comment-3581353-20120304174931/@comment-3083473-20120304222220

And it makes sense how Patricia doesn't want to hide any more secrets from Eddie.

But what about Mick and Mara? Wait...does Mick even come back this season? So, assuming Mick isn't there, they may need some more knowledge of things in their group, so they ask Mara to join, or they feel bad that she's the only one unaware of Sibuna. And then Mick comes back and it's just like "lol hi we're all cursed".