Adult PC Game: Sexy Witch 5: Down the Black Hole - Final by Virutal Passion Archive

After helping a lady-orc find her way home, you ended up in the secret passages of a castle belonging to a local duke.
You find one-way mirrors in these passages that let you spy on what is happening on the other side of the walls.
Every mirror offers new titillating viewing. And of course,
you’ll get your chance to leave the secret passages and joint the seductive ladies you find.​

Sexy Witch 5: Down the Black Hole - Final by Virutal Passion Gameplay Preview