Can you please rewrite this sentence into terms easier to understand? Thanks.

Now celibacy yielded to widespread clerical concubinage and, in the convents, to promiscuity.

Basically, it means that the priests and nuns had sex. And they were not monogamous.

Oh. Ok. Makes sense. Thanks!

that does not.

I apologize for any confusion. "Celibacy," which is the state of being unmarried and abstaining from sexual relations, was abandoned by many priests and nuns who engaged in sexual relationships outside of marriage. In convents (where nuns lived), promiscuity (having sexual relationships with multiple partners) was common.

Certainly! Here's a simpler rephrasing of the sentence:

"At that time, the practice of celibacy (not getting married) gave way to a common occurrence of priests having romantic relationships outside of marriage, and within the convents, there was a lack of adherence to strict moral bounds, leading to indiscriminate behavior."