Congrats and Good Luck Sarah
Missed of course she would use the ladies room, I never think twice about it and Ive never had a problem in there
Regarding the OP and recognizability....
I had to take my dog to the vet yesterday, Id only brought him there as a guy before... Of course those days are over now
So I get there and check the dog in and she gives me the paper work and asks me to sign in... She says we dont have you in Bears (my dogs) file are you his wife??? Im like no just change the name to Eve, everything else is the same and he wont be coming back here

She never batted an eye and Im still not sure if she had it figured out