spouse-breach

The leopard is a beast most cruel, and is gendered in spouse-breach of

Mediaeval Lore from Bartholomew Anglicus

So here, in the realms of spouse-breach, marriage is once more king, or rather the throne is felt to be empty -- the kingdom an anarchy -- without it!

A History of the French Novel, Vol. 2 To the Close of the 19th Century

Indeed Guinevere never seems to have hated or disliked her husband, though he often gave her cause; and if, until the great repentance, she thought more lightly of "spouse-breach" than Lancelot did, that is not uncharacteristic of women. [

A History of the French Novel, Vol. 1 From the Beginning to 1800