Not that I remember, anyhow, but that's largely irrwlwvant. We know she can cast spells, because she's told us that much, and quite explicitly.
Yep. In terms of Fort, we're likely looking at something above +15 for a modifier if he's naked, assuming no feats or such to boost it. Serini got really lucky with that poison, and even then it took an awful long time for it to take effect. As for Wis, beyond the thing with the Symbol, O-Chul, of all poeple, getting dominated sounds, narratively speaking, very unlikely. That's not an O-Chul thing to do.