This is a complex situation and it's even more complicated when you examine the applicable laws in different nations.
For example, the age of consent in Australia is 16, so I think it unlikely that the legal authorities would have taken any action against the woman in question. And maybe, in Australia, the 16 y.o boy would have already sex with a similarly aged girl.
Just to illustrate, recently on a train, this conversation was overheard, a young boy, who looked about 14, was talking to a girl. He had his phone's volume turned right up. Cant say I took much notice of the conversation, until: A young girl's voice saying, "I'm gonna come over to your place this evening, and suk your dik for an hour."
In Europe, there is hodgepodge of legal ages for sex; Refer the document referenced here: https://fra.europa.eu/en/publication/2017/mapping-minimum-age-requirements/consent-sexual-activity-adult#:~:text=The%20lowest%20minimum%20age%20is,sexual%20acts%20between%20young%20persons.
So no matter what American christian's think, sex is a primary instinct that has a very strong influence on our bodies and minds.
I think back to when I was young and involved in the scout movement. In the town I then lived in, a camp hut had been built. One wall had 9 bunks (in 3 tiers) built in. It was not uncommon to see a young kid in every bunk busy masturbating.