"Yes, well I think probably you did, and that worries me." Mr. Fisk said to Nick's growing sense of panic "You see, when the glove is manifesting other forms of clothing, it may seem to be gone, but in fact it never really is. It merely transforms itself into a sort of layer of your skin on that hand "“ a safety control you see, so that removing the newly formed clothing does not cause the glove to be removed, and thus possibly lost." He sighed "But I fear that when you picked up the medallion with that hand, the glove still counted as clothing for Zulo's purposes. As a result, the medallion did transform you... into you, or rather back into the form you were in."
Mr. Fisk turned back to the medallion, and after a moment, turned back "if I'm interpreting this correctly, the medallion's last transformation was based on information about a half-hour old at the time. From this and your description of events I will surmise that the medallion triggered from the glove's contact, but treated it as if it were the last item of clothing the glove had manifested itself as, meaning that you turned into a version of your current form just before you had become naked."
Nick struggled to grasp it all. "Fine, so that explains why I just turned back into Megan," he said with some measure of relief. "but it doesn't explain why I can't remove the glove now."
"Ahh well, as you may have gathered I am using some means at my disposal to view and analyze magical auras." Mr. Fisk explained, and after Nick nodded, he continued: "and while I do see the gloves aura on you, I do not see the glove itself, which I would expect to be the case. I believe that in the process of the medallion's transforming you back into you, the glove itself became a part of you, as it was in the form of skin at the time. As a result, the glove can no longer demanifest itself without leaving you skinless head to toe, which it won't do thanks to another safety feature."
"Umm, that's good, I guess... about the skinless thing." Nick said, the image doing no good for his stomach "but so now what can we do about it?"