Bonifratz

Sounds a lot like Phineas Gage.

His orthography is even worse than Trump’s, I did not see that coming.

This is really the crux of the matter. Sure there’s (many) differences between 5 and 15 year olds. The question is, why bring it up? Why is it relevant in the context of Trump’s and Epstein’s crimes?

As long as she doesn’t elaborate on it, the ostensible interpretation of her comment is that she thinks trafficking and sexually abusing a 15 y/o child is somehow less illegal or reprehensible than doing it to a 5 y/o child.

Yikes. Release the files but please don’t release a pic of Trump in a bikini!

What are your plans and expectations? How long do you want to stay? Do you want it to be a long-term relationship? Do you want to get married to her, have kids? If not, do you want to visit regularly? Are you willing/not willing to substantially support her/the family? etc.
As this is an unusual situation (which isn’t a value judgment), I think it’s important to really think these things through, and then communicate them openly. But also understand that many cultures (including Cambodian, I think) tend to prefer subtle hints over direct communication, so in order to really understand her expectations, it might be helpful to get opinions by some Cambodian third party (I’m sure there’s some English-language Cambodian forum you can turn to for that).