Mampho overheard Funani talking over the phone arranging to have meeting with Jonas because he lied about the forensic report. Mampho was then told to keep what she heard to herself but then it was just too heavy for Mampho to keep what she heard to herself. Knowing Mampho she then told Dorothy that Finani is hidding something big from the family.
Dorothy then adviced her not to tell anyone as Funani said and luckily Mampho did not tell Faith when she asked her if she knows or overheard anything. Faith has been worried about Funani and suspect that he is hidding something from her.
Had Mampho told Faith that would have sabotaged Funani’s plan to uncover the truth. Faith would have tried her level best to keep Funani away from the truth. Now it is only a matter of time before Funani discovers that Faith is the mastermind behind his wife’s death.
Source