im pretty sure she is allowing it for reference. and im sure she trusts that noone would steal this or anything. it could also just be unworthy of a copy right cuz it was a practice, or sketch maybe?? idk but you should treat it as if it was copyrighted. i dont think u would copy any of it or anything but still its always nice to just mention it.
wow, all of this out of your imagination ! I can't even draw eyes like these even when I use stare at my eyes for ages in front of a mirror as a reference :S . Love the simplicity implying realism in your sketches . I guess you keep studying people's eyes when you talk to them or watch TV and it somehow got stuck in your head