FTHT-139 "Want to see big sister's panties?" A bittersweet memory in the shopping center's restroom. "Don't tell Mom about today, okay!" "...Okay."

Back then, I didn't know anything yet... one summer vacation afternoon.
One day, while shopping with Mom at the mall, I got separated from her.
I happened to be looking at a woman's panty shot as she sat on a bench, and our eyes met.
Then she said, "Hey, are you interested in my panties? Should I show you?" Taken to an unpopulated area, under the condition that it must stay a secret from Mom, I indulged in her private parts...
I rubbed her panties vigorously.
I pushed them into her slit forcefully.
I pulled down her panties to see her ass crack.
I tugged at the pubic hair sticking out of her panties.
I poked at her soft flesh through her panties.
Even though I was told "It's a secret," I ended up telling Mom, and after that, she never appeared again.