Why is maturity important unless it's a professional setting? Which isn't to say you're not good or she isn't good, but clearly she's being "mom" and assuring you that your penis gets a gold star. Y'all are potentially likely to have compatibility issues, but I don't see it as especially problematic or exploitative or all that. Does he have any younger siblings, and do you know them? You are not giving credit to the guy who appears to be treating her well.
Whose authority matters here when they are on the plane, ready to jump?
Is an 18, almost 19 year old girl dating a 32 year old man that bad?
Life is short. Unless it appeared that she isn't mature enough but let's not assume that. It was extremely unlikely that I would find a 19 year old similar to me. Does your family accept cigarettes as a form currency? Do you want my honest opinion?