Adult star used her 'butt money' to buy her nan £35k car – and will earn cash back in an hourViral star Piper Rockelle splashed out on a £30k Ford Bronco for her nan using earnings, boasting she'll make the money back in just one hourView 4 Images She loves her nan . Piper Rockelle, who raked in a staggering £2.1m ($2.9m) in a mere 24 hours on the adult content platform, is now treating her family with her earnings. ‌Both ladies seemed thrilled to be spending what the grandmother referred to as her granddaughter's "butt money". In the clip, Piper's grandmother Mimi can be heard saying: "Going to get a car with my granddaughter's butt money. One viewer asked: "Y'all I can't hear Mimi, did she say 'butt money'?".