Little Alex and step-sis Epiphany are both kept in diapers, but Epiphany has been left in charge for the day. Alex has been bothering and annoying Epiphany, and throws a tantrum when his step-sister wont let him peek at her phone.  Epiphany decides enough is enough when Alex pulls her hair, and decides to dish out a very humiliating and exposed punishment to her step-brother, in exchange for not tattling on him. Alex is bent over the ottoman for a spanking, as his diaper is removed, exposing him fully for her while his protests get him nowhere. He is hand spanked hard on his bare bum, balls, and asshole, as Epiphany fondles and smacks her step-brother with glee. Epiphany decides it is time to dish out a serious dose of the belt, just like she knows he is used to. She thoroughly swats his already red bottom with the belt, even swatting his embarrassing erection and exposed balls. She threatens again to tell on him unless he obeys and takes several sets of hard swats on his bottom and even his poor butt hole with the belt. The belt smacks his most exposed parts over and over as he struggles to stay in position.  When the punishment is done, and Alex is sorry for being such a brat, they hug, step-sis begins rubbing his hard cock, as he calms down from the belt spanking. Before diapering her step-brother again, she strokes him with some creamy oil, until he is all worked up, and then tapes him up as she holds him close. This is the hardest, most taboo, and extreme of our M/F ABDL spanking films yet, with the best angles and quality of our latest films rolled into one.