Your Momma kissed the chauffer,
Your Poppa balled the cook,
Your sister did the dirty,
in the middle of the book,
The thirteens. Right On.
Your daughter wears a jock strap,
“Did the dirty” in this particular context refers to his sister having sex, presumably at to young of an age for it to be legal and perceived as morally right by people.
The Thirteens White