The heroines in Marie's "Lais" are often imprisoned. This imprisonment may take the form of actual incarceration by elderly husbands, as in "Yonec", and in "Guigemar", where the lady who becomes Guigemar's lover is kept behind the walls of a castle which faces the sea, or "merely of close surveillance, as in "Laustic", where the husband, who keeps a close watch on his wife when he is present, has her watched equally closely when he is away from home." Perhaps it reflects some experience within her own life. The willingness to endorse such thoughts as adultery in the 12th century is perhaps remarkable. "It certainly reminds us that people in the Middle Ages were aware of social injustices and did not just accept oppressive conditions as inevitable by the will of God."