“request” Identify this porn: door to forest world, pond barter, magical king twist (pre 2006)

Looking for an old plot driven porn movie I saw on DVD years ago (could be anytime before 2006).
She goes through a door into a real physical other world (open forest area). While searching for her boyfriend, there’s a memorable pond or lake scene where a creepy old guy watches her bathe and barters with her she shows her breasts then lets him touch them to get information.
At the end she finds him held in captivity. They have sex, but right after his face magically transforms into an evil regal king it was a trick the whole time.
This was actually the first porn I ever watched, so it’s kind of stuck with me lol.
Any ideas? Thanks.
i prefer watching porn over getting into one night stands and hurting emotions, just a note, no one is gonna care but just putting it out there.