+/- 10 years = OK
Outside that 20 year band = kinda creepy tbh.....
It has that potential. But my grandfather was 16 years older than my grandmother. And even though she remarried (and outlived another one) later, she swore that was the love of her life to her dying day. He was 32, she was 16...they had 11 kids....the youngest was my mother.
It was scandalous then...it would probably be even more so now...but if it wouldn't have happened, I wouldn't be here.