This happened to me yesterday

I was @ the park with my daughter yesterday & a few Moms & kids from our playgroup. Tara made her way over to the swings, so I was pushing her. There was a teenage girl on my left swinging & a teenage girl on my right pushing a toddler on a swing. Tara was on the middle swing. This woman/girl looked @ me & asked "Are you 1 of the babysitters"? I didn't really get what she was saying at 1st, so I said "What"? Then I realized that the teenage girls were babysitting the kids that they were with. She repeated herself & I said "No, I'm just here with my daughter". She said "Oh, cause you look so young". I was caught off guard & didn't say anything else to her. I kind of wish I had told her I was 40. She was way younger than me & she shouldn't disrespect her elders like that. haha. Let me explain. I turned 40 in June. Ever since I turned 21 I've been cursed to look younger than I am. It's something that has always bothered me. I know it should be a complement, but I've always took it as an insult. For years I got carded. After a while it just gets to be a pain & I always got really embarassed. I don't get carded as much as I use to, but people still don't believe that I'm 40. I think I look at least 30, which is fine with me. I honestly don't think I look under 21. I have crows feet/lines around my eyes now. I was so excited when those lines appeared. I thought I would finally look somewhat older. Not so much. If I'm not smiling or squinting you can't see the lines, so what good are they. So now I'm using wrinkle cream to get rid of them. Even my hair needs to be dyed & the white hairs don't help me look at least 30. I've had white hairs since I was 21, but didn't start dying my hair till I was 30. Do any of you have this problem & do you get insulted or take it as a complement? I always thought someday I would like being told that I look younger. It hasn't happened yet.