If I remember right, the suit is brought by the girl’s parents. She was in an underage relationship with a much older man, and was confessing it (supposedly) to the priest in question.
Now Mom is suing the diocese because of, well lots of fallout.
In this case the girl was confessing being in a sexual relationship. So it wasn’t a case of forced rape, but statutory rape.
First: Under our law, minors under the age of consent cannot say "yes" to a sexual relationship. Statutory rape is rape. We aren't talking about an eighteen year old boy and a girl who was 17 and a half. Second: the reason this has become a cause of action against the priest is [supposedly] because the girl wanted the "relationship" to stop, which moots your argument anyway. If she's telling the truth, asking the priest for a way out doesn't sound consensual to me.