Write a story about a guy named NAME_1 and his girlfriend NAME_2. NAME_1 secretly uses NAME_2's high-heels to masturbate. He rubs them agains his penis until he cums. One night NAME_2 catches him in the act. She laughs at him first, but then she uses her feet to rub his crotch. NAME_1 gets super horny. NAME_2 offers him to fuck her while smelling her feet. NAME_1 agrees. They have a strong orgasm together.