I nearly overlooked this thread thinking it boring. Anyone reading our stories knows my wife is an exhibitionist, usualy wears no panties with mini skirts, and wears the tiniest bikinis. She will go topless and nude whenever possible.
Still over the years she panics and covers up if someone sees her in a full bra and regular panties.
All I can say is women are weird!
The real question is why do they buy fancy, frilly, lacy, flowery underwear and not want anyone to see it?