So basically making her want to have sex because the protagonist wants to have sex with her... And the religion came in between but he had to find a way to get into her pants and that was through changing her mind about religion. It's a classic really and not very insulting as long as it doesn't address the beliefs of certain religion rather it addresses the beliefs of a person.
It's way too common in comics that I have read, that the religious girl gets brainwashed by someone to fulfill that someone's desires and of course the religious girl begins very innocent and ends up showing the "bad girl" inside of her while staying innocent at the same time. The hot thing about this scenario is that the religious girl is too reluctant about taking decisions and takes a lot of time to change her mind unlike other girls in the story.