I guess we'll find out more about Leia and Willi in the next chapter - Ocean wouldn't leave us hanging without showing us what goes on behind closed doors when WIlli gets there ...would he?
I'm more raising the issue that's some of these things aren't clearly stated, so they're open to interpretation - we end op justifying what we believe. The old WiaB Willi just had things happen to him, there wasn't anywhere near the level of self-reflection or self-awareness. I guess that's one thing good (in my opinion) that working on SG has done for WiaB, it's got a lot more weight behind decisions and actions now.
THe thing is, Katie and Willi know what Katie had blackmailed/threatened him with. Leia doesn't (if that's who Katie is talking about), so Leia might think it's all about her and Willi. But since he's come back Willi isn't really being that circumspect, not caring who's in earshot when talking to Leia, so ...I don't know. There might be other angles or I'm overthinking it. Katie can't threating Willi with telling Leia about Willi's feelings though, Willi would laugh at that.
The religious organisation might have connections to Daphne also, and Dana's brother being in prison might be because of the things the organisation is doing. Which means that if Dana needs to bat for Willi in court, her dad and brother will have some leverage.
The religious organisation might be more alongside the dark money side of things, not a specific church/cult, but people funnelling things through local organisation, using fundamentalism as a way to control pawns.