I'm 37, and I've been in a relationship with a mid-40s woman (Amy, she doesn't want to tell me her specific age, which I don't mind) for about a year. She has a 17-year-old daughter I'll call Jess.
Over the weekend, Jess had a school event and had asked me for a ride in advance. I didn't mind in the slightest. I drove her over to the school and we had a nice chat in the car. When she got out though, a bunch of her friends were there, and she waved to me and shouted "Later creepy stepdad!" with a huge smile.
I think it was a joke to her friends? They laughed and I stared awkwardly for a few seconds. Then Jess said "Go, go!" literally shooing me away.