....
 

here's one that fits the description.

And another that... well...;)

These too:

and another nice one:

Here's another nice one, no one knows why she wears two panties.

aquavite is pretty spot on

when woman have a heavy flow sometimes it would leak

but as for panty liners... it is pretty much the same as wearing two pairs of panties

i watched this documentary on ladies who cant help but pee themselves, most of them wore very absorbent panties

it would just happen when they were exercising or whatever, laughing etc

Some more to come

Another one

You mean like this?
 

(similar pics would be appreciated.)

Yes, exactly

Nice ones