Who is Mma Tsolamosese from The Kalahari Typing School for Men and what is their importance?

Mma Tsolamosese took in Mr. Molefelo when he was a young student. Her was a prison guard, and the family had to save up for luxuries such as a radio. During his time with the Tsolamoseses, Mr. Molefelo stole their radio to pay for an abortion for his girlfriend. He now wants to find Mma Tsolamosese so he can make amends for stealing.