I know this won't be popular, but it's for a few reasons:
It wasn't and isn't illegal.
Most people would look at her and see a hot woman and understand it.
This whole puritanical BS that if you are over 18 and find someone under 18 attractive, that makes you a pedophile, is a modern a theme. Back then people were free to admit that they found young women attractive without being labelled by so many to have a mental disorder.
I speak strongly about this because I think we are doing great damage to mental health to repeatedly claim it's a mental disorder to have a completely normal and common biological attraction.
But don't get me wrong, I 100% support protecting minors from predators. I agree these laws should exist, I just wish people would stop pretending that there is something wrong with the attraction itself.