It's no secret that teen girls carry huge dildos and vibrators in their purses. You'll when they have their favorite dildo on them when you go near their purse. They flip the fuck out... and scold you for being naughty!
She doesn't want you to know she goes in the rest room, hops in a stall, takes out her dildo and fucks herself silly right then and there. Then when she cums out, she's got a huge smile on her face and dripping wet panties. If you get close enough, you'll actually SMELL the pussy juices dripping down her thighs!