A one-piece thong

You return downstairs, twirling for your father's inspection. The neon orange shows off your tan. The material drops like a halter, showing ample cleavage. At your waist a thin cord holds the front and back together as the two front halves meet to go through your legs and between your perfect asscheeks, back up to the waistcord.
"What do you think Daddy, can I go outside and get my ass tanned in this?" you tease, dancing your cheeks in his face.
"You try, and you'll get your ass tanned inside." With that, he throws you over his lap and smacks the exposed cheeks