I think Locke knows or at least suspects that Jude is immune to glamour
People started saying the Locke probably used his Ganganach magic on Taryn and Nicasia to seduce them. If Locke has to glamour the more submissive sister, then it would make sense he also tried to glamour Jude into liking him because she's always on guard around faes.
In the coronation scene, Locke asks Jude if she'd cry if he ever hurts her. She said no and that she'll hurt him back. He's surprised because he probably thought she's under his influence which would expose her secret that she's somehow immune to his magic. I just suddenly thought of this while I'm stuck on sleep paralysis and I haven't read the books in a while so correct me if I'm wrong in some way✌
+ bonus question:
In tqon, Taryn stitches Jude up. But where did she get the needle and threads? It doesn't say if I remember correctly. I just read tls and it also doesn't explain where Taryn got her supplies to stitch Jude up