This is really just Soleia gambling on an emotional weak point in Erudian's armor... it could go very badly for her, and it wouldn't surprise me if she was using black magic RIGHT NOW to make him more susceptible. Because that's the thing, she said it herself. If he was his old self, he *would just execute her*, proof or no proof, fuck proof, the suspicion is enough. He's only being cautious because he's worried she has more in mind for Yerenica that he can't predict, and that unfortunately tipped his hand to her.
YERENICA, COME ON, BARGE IN AND TELL HER OFF!!