Yes it is, and the religious do fall as the humans they are. However, this story primarily deals homosexual sex which is NOT normal.
Confession and contrition are the answers to the problem.
I'm sure there will be much discussion about the this unusual story, yet the story is not unusual. There is an example of this behavior in Revelations.
In the 1st part of Revelations (chapters 2 &3) John writes to the 7 churches of Asia and singles them out first with praise and then some constructive criticisms about how they could do better. To the church at Thyatira he was particularly harsh.
Apparently there was a woman among them who claimed the title of prophet and maybe even had a position of some authority (an assumption on my part) who was essentially teaching a new meaning to the commandment of “love your neighbor”. I have read commentary that suggest she was teaching that the way to heaven could be found in her bed.
John's curse to her and all who followed her ( and refused to repent)was dark indeed.
Notice how this woman for all her evil was given multiple chances to repent and be reconciled. I'm sure the Nun in this story also was allowed to be reconciled to the church, though that would not sell as many books.
Sol said, "There's nothing new underthesun."
Did she have twelve stars around the head?