Finger her hard from behind

Is this cute slip wet already? It will be in a couple of seconds!

You press your body against her back and breathe hot against their neck. As she starts to shove her butt into your crotch, you let your fingers dance over her most intimate area until you feel the slip becoming damp. She can't hide her arousals anymore and it's just a matter of time until this annoying slip will be torn off!