Serenity back in diapers

Serenity is a 12-year-old girl who is very beautiful and lives with her sister Aubrey who is 16 years old and on these holidays Ruby of the same age is spending the holidays together and one day her parents go on a work trip a month old and leaves the daughters with the nanny Luiza, and when Aubrey and Ruby started making Serenity pee on her clothes and didn't stop causing Luiza to put Sereniry back in diapers, Aubrey and Ruby dominate and humiliate Serenity by turning her into a baby