OT; question about Dawn

[JDMeans@xxxxxxx]

Hey all, I have a question regarding series continuity and Dawn(a thorny
prospect, I know), for the next chapter of Defenders of the Night.

The question is; Was it established in the series when Dawn learned that her
sister was the Slayer? I'm aware that all of her memories, and all of
Buffy's memories of Dawn, were the product of the monks who disguised the Key
as Dawn, but since those memories are real to them, this still matters to the
story. If there were any eps in season five where this was brought up,
please inform me.

Kirayoshi

"Once, years ago, I saved the life of a wise old priest.
Grateful, he made a gift to me of these few precious words:
If you find yourself on a cliffside, trapped,
with a hungry tiger waiting above
and a hungry tiger waiting below,
and by chance you spy a single strawberry
growing from the cliffside...
pluck the strawberry...
and bite into it...
and taste it."
--Frank Miller
"Ronin"