The issue is, if she's actually the Stalker, (A) restraint means she gets to do nothing, and if we confirm it via showing her the Philter notes (and her subsequently freaking out over that), (b) we can instant-Exorcise her, which would leave some kind of weird and thus far unrevealed method of telepathy as the only way the information would get out-and considering the information in question was literally gained in her own house, I doubt it would reveal much. (Of course, we can simply refuse to reveal how we got the other note). I feel like I will be doing such, unless we're really against it. After all, she might feel repentant if she's going to just leave it out in the open.