The good book says to remove the plank from your own eye before attempting to point out the speck of dust in your brother's eye. It's clear Boni isn't a fan of the scriptures, as she took her self-righteousness to Khethiwe's home to out her to her mother. All out of selfless concern for Khethiwe's well-being, of course.
Understandably, Khethiwe's mother was angry and disappointed, but grateful to sweet, innocent Boni for saving her daughter's life and studies. What Boni didn't count on, though, was that she'd be caught in an indiscretion of her own. Some would say and indiscretion as scanadalous as Khethiwe's herself.
Khethiwe's having an affair with a married man, Boni's having an affair with an a married man. Is Boni any different? Whether or not it can be argued that she is, Boni and David were caught by Khethiwe in a steamy moment of stolen passion. She took full advantage of the situation, snapping pics of David and Boni caught with their pants down, quite literally. A classic case of the pot calling the kettle black.