Licking pussy of her daughter for a deuce at school

Daughter brought from school a deuce. Mother, to punish her, forced her to sit on a chair and spread her legs. She licks her daughter's pussy and fucks her finger. These are the special services for those who get bad marks. Mother played with her vagina, at the end smacked her daughter and left. This is so strange. You do not agree? Did she punish this girl?