- Description: Another person's spouse / partner being unfaithful and the one being cuckolded being aware of the situation. Also acceptable for when the story is clearly meant to invoke jealousy or sympathy on behalf of the person being cuckolded.
- Note: Should NOT be confused with cheating.
- Gender: The gender of the one being unfaithful determines if the tag is placed in the female or male namespace.
- Japanese: 寝取られ
- Slave Tags: Female, Male - with notable synonyms cuckold and netori.