cuckquean
cuckqueen

Cuckquean refers to a woman with an adulterous husband.

The fetish specifics can range wildly, from loving treatment toward the cuckquean to complete humiliation and debasement.

The female equivalent "cuckquean" first appears in English literature in 1562, adding a female suffix to the "cuck".

However, very commonly a requirement for the fetish is that the cuckquean is somehow humiliated, whether this is acted out to be intentional or as some sort of by-product of the situation (e.g., the parties involved are somehow too sexually aroused to stop).