In this second installment of Wagner's Ring, we meet the ill-fated sister/brother/lover duo Siegmund and Sieglinde. They meet each other, fall in love, realize they are twins, and do it anyway. In this scene, Sieglinde (who, most inconveniently, lives in a house with a tree growing in the middle of it) tells Siegmund how she longs for a hero to come pull the sword out of the tree and rescue her from her husband, who is currently in a drugged sleep. Scandalous!
You can read more about the opera here.
You can listen to the recording here.