IIN that I really want to be with an older man?

I'm a 35 year old dentist and dating one of my patients who is a 19 year old girl and in college. She is also a model and aspiring actress. I really love and respect her a lot, and she is always asking me for advice and money, of course. Lol. I would say that I am mature but not boring. I'm interested in many different things like health and fitness, meditation, skiing, tennis, golf, and hiking. I even have invested in the stock market. Now despite all of that for some reason I still don't see myself as a genuine adult yet, and I don't know when that point in my life will come, if ever. But just to be sure I am getting ready to lease a convertible sports car if and when I encounter the first signs of a coming midlife crisis. To be honest her parents don't know that she is dating her dentist and we have promised each other to keep it secret for as long as possible. The world is simply too judgmental and both of us are one hundred percent minimal BS people and we definitely don't need everyone else telling us what we should or shouldn't be doing.