Sadly everytime I've misplaced my glasses and was sure I knew where I'd them last.....I was absolutely wrong! Mine have turned up in some odd places. Dropped to the floor when I missed the nightstand, laundry hamper with post-shower towels once. The worst is that they only have to be set down......I've lost them on top of the microwave because I never thought of looking there. Just not a usual place to take them off. Maybe if she tries to backtrack and lets go of the idea she had them in the bathroom. Might also help to remember what she was doing in the bath.....shower? teeth? make-up? Sometimes a clue pops up in your mind. I guess I'd do the garbage too as a last resort, but I think I'd sit back, have a tea or coffee, watch something silly on TV and then try again first......
Good luck. You must be having a terribly frustrating day. Hope you're able to post that you've found them real soon!