Am I One of Those People?

I've always been a positive person. Age never bothered me. I was always the youngest of who I hung out with so why would it bother me when everyone else was older right? I looked young too, being carded well into my 30's. Suddenly one Girls Night Out when I asked the bouncer if he needed ID his reply was, "I was going to ask for your social security card". Not an accurate dig but it made it's effect. Suddenly I had a few grey hairs over my ears. A crease showed up in between my eye brows. One too many mean looks at my kids I guess. But it was adding up. I was getting old. I couldn't be one of those vain people who cared that I was turning 40, could I? I had friends who got Botox and I thought they were crazy. I drove a minivan and didn't care because I felt the car didn't define me but suddenly I'm looking at sporty cars thinking I would look better in it. Who did I become? As I travel down the path of this final year of my 30's I'm not sure I know who exactly I am. I want to have a full life. I want my children to look at me with admiration of what I've done with my life. But this little part of me wants to look good in the part too. Is that bad?