Her black shoes show in the cabin shot. That’s where I got that information.
But hey, maybe she took the time, as soon as she heard the horn showing there was going to be a crash landing, to take off her black shoes and put on the handy-dandy yellow rain boots she had in her purse.
Were they tie shoes? Pumps? Loafers? Tie shoes would stay on. Loafers or pumps... maybe of maybe not. I wouldn’t count on it.
How silly. You should post for us the image showing the soles of her black shoes. The shoes someone found imaged on the Internet have a rim around the bottom of the sole. Did you see those? Your other ‘what is that’ can easily be a bare foot of another passenger, or even Fuddy’s right foot without a shoe. If Fuddy was ‘offed’ in the water, the better bet would be one of the other passengers, like the one who was in such good shape as to swim ashor in current where Fuddy ‘drifted’ 200 plus away from the other passengers. There is no diver showing in the photos.