Be manipulative.

You lean into him, pressing your breasts against his arm and batting your eyes as the two of you go shopping. You get him to buy you far more clothes and other sundries than he had planned making a day of shopping. Around mid afternoon you find yourself in a lingerie store and he enters the stall with you as you are changing. His hands are all over you in an instant and his hand is over your mouth. You feel his cock against your bare ass and you start to panic a little, not wanting to make noise or dive out of the stall you are not sure what to do as his cock lines up with your fresh tender cunt.