We are told in the chronicle written by Desclot soon after his time, that Peter was only trapped into cohabiting with his wife by the device which is familiar to readers of Measure for Measure.
It continued among the Albigenses and other dissident sects of the middle ages, among whom it served a double purpose; for their elders were thus not only able to prove their own chastity, but to elude the inquisitors, who were less inclined to suspect a man of the catharism which regarded marriage as the "greater adultery" (maius adulterium) if they found him cohabiting (in appearance at least) with a woman.
Concubina, a concubine; from con-, with, and cubare, to lie), the state of a man and woman cohabiting as married persons without the full sanctions of legal marriage.
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