All my childhood, I felt like the twenty-something girls were mesmerizing. The way they walked and talked, did their makeup, dressed, spoke to their friends, laughed about their love lives… Seeing all of that in my family friends’ daughters or my older cousins made me itch with the wish of becoming one of them. There were times when I would literally count the years until I could consider myself one of them.

Not too long ago, while sitting in the driver’s seat with my friend’s six-year-old in the back, I realized something: I had just taken her on her first “big girl” day. We went to the movies, got ice cream as she told me all about her six kindergarten crushes, bought some colorful furry pens for her to bring to school when she starts in a couple of months, and then blasted the three songs she knows on the car radio with all the windows down (This was probably the first and last time I’ll ever be okay with “This Girl Is on Fire” playing four times in a row.)

And during that ride home, I finally saw it: a sparkle in those exhausted little eyes of hers while she sleepily sang along to the radio. The sparkle only a girl knows the feeling of. The sparkle that clearly says that all her friends are going to hear about her outing with her “older friend” tomorrow.

But something I wasn’t expecting to catch in the rearview mirror while checking on her was a new spark in my own glance. Something more mature. Something that reflected a quiet feeling of contentment and satisfaction. I realized that the only thing better than enjoying your own “big girl dates” was being the one able to make the magic happen.

Now I’m the one with the power to play any song in the world at any volume while driving. I’m the one who can make the spontaneous decision to stop at a drive-through for milkshakes even though we already got the biggest popcorn at the theater (even better if we can make a “secret deal” not to tell her mom about it). I can bring her nail polish or lip gloss for an unplanned makeover. I can tell her my everyday stories that sound like teenage movies to her or give her advice if she needs it. I can fill a huge box with shiny tulle, candy, individually wrapped kids' makeup and accessories, purses, and clothes and tell her Santa accidently left it at my house, just so I can sit with my coffee and watch her slowly disappear behind a mountain of wrapping paper with a huge grin on her face.

For years, I thought becoming one of those older girls meant stepping into their lives – their conversations, their confidence, their freedom. But what I didn’t realize back then is that the real shift happens quietly, almost without warning. One day you look in the mirror and see traces of the women you once watched so carefully. And sometimes you catch it in a reflection that isn’t even your own – in a rearview mirror, in the way a younger girl looks at you, in the sparkle of admiration that used to live in your own eyes.

And that’s when it finally clicks.

Somewhere along the way, without noticing it, the countdown ended, and you became the older woman in someone else’s story.