If this is Korean, remember that you are considered 1 year old at birth and everyone is considered a year older on the first of the new year. So he could be what we consider 20. So depending on what day each of them was born, he could have been in the best case scenario (say he was born Dec 31 and she on Jan. 2nd), the equivalent of 15 when she was born.
Yeah I was “ wait he 18? Wait What????? That fast ? Dlansownskans
but this is not korean
Is it possible that it is in a country where age is done in a similar way? If not, I have no clue....
you just gotta wonder what he did that led up to suddenly having a kid at 13