Ever heard of trial and error, just try different approaches for different outcomes?
It's what toddlers do when you give them this:
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But since we know this to be too hard, i'll spoil you.
1st: Go to verdant valley.
2nd: Find the encounter where there's a perception check pretty early (it's the left one when you're at the fork on the road).
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3rd: Fail that perception check.
4th: Pick the option "climb her".
5th: Pick the option "her ass".
:EDIT: added a pretty picture as illustration.