Yes but Jacquil spray on her self in SJI - 250 and said It's do not work on Me
Yes. So when Erin says here, "Laura tested it on her. No effect," she's wrong.
But let's be charitable and remember that Erin was upstairs contemplating suicide when it happened.
At this point, I get the vibe that the only thing that could *fuck it up* would be Erin (or Adrian) getting MCed.
But Erin at least already is being MCed, by the watch. Sure, they might have got together without the watch. But it's hard to say how she'd feel about him if she were suddenly freed. Maybe she'd be careful to see the situation through his eyes and to understand his actions before rushing to judge him. But that doesn't sound like Erin to me. (On the other hand she might be annoyed to have the bliss of the watch's control removed from her life and consider that a betrayal.)