I'm sufficiently paranoid that I consider the option you're feigning this, especially since we've been discussing it, a very distinct possibility as I will explain to everyone below... though for the moment I will assume you are not.

We have had mason circles many times before, they are typically infiltrated more often then not. What that means is that one of the bad guys is teamed up with his allies but also teamed up with his mason buddies, who don't realize he's untrustworthy and basically feeding all the information he's getting from his mason buddies to his evil allies. Its happened enough that most of us take it as a given that there's at least a 50/50 chance if we're masoned to other people one of them is a bad guy. Let me give you some prior examples, and I'm probably forgetting some.

Game 4 - Here we had a warder and Aes Sedai who were masons, the warder was the cop and the Aes Sedai (me) was a Darkfriend.

Game 7 - Here we had two mason pairs, one was clean, the other wasn't (also me)

Game 8 - Here we had a mason pair that was clean

Game 9 - Everyone was broken into 2 and 3 man mason groups, 6 total groups, each of the darkfriends was in a different group, so 3 of the groups were infiltrated and 3 weren't.

Game 12 - FT and I were masoned and both assumed we couldn't trust each other, he was sure I was scum since his role told him he'd support whatever I did, we were both clean and ironically we both got assassinated on night 1 and 2

Game 16 - There were several mason groups in Mad Muad, some coalescing mid-game, some were infiltrated, some weren't, some became so.

Last Game - This is the one that makes me doubt your ignorance of this factor, you were a mason last game, and you were "evil", taken over as a SK basically IIRC. So it's a bit dubious to me that you didn't realize members of a mason group might be untrustworthy even if you'd missed us discussing it the last few days or all of last game when I was pointing out a ninja might be part of the treasure hunting crew, which were masons.

As for your character claim supporting this, you appear to be Quicksilver, our enemies are shapeshifters. We already know their character claims will be solid, that's why I thought a third party unfamiliar with Marvel might trip up yesterday but the Skrull wouldn't. In a game where the enemies are shapeshifters an infiltrated mason group is practically a given, if we don't have one it will probably be because beet felt it was overused or would make an ironic twist.