I am on the PC, and my first thought was uh oh, mods are doing this. But the only mods I have added before this started are a hair mod, an eye mod, one to make black robes darker, and one to make farm gloves black. I cannot see any of them causing this. I disabled them just to be sure, but the nekkedness is still there. Granted I am not sure if this is because now my savegame has recorded them being naked. So maybe leaving the cell for over 3 days would get them to reset with their clothes on?