why does Tambu feel guilty about disliking her brother

I think that her brother Nhamo was given the money to attend school. Tammbu had to raise her money herself growing vegitables. Nhamo used to steal from her.

She feels guilty because she does not feel sad over his death.

Unlike Tambu, her brother was allowed to go to school (her parents could only afford tuition for one child). Tambu, in turn decided to turn to growing vegetables and selling them in order to earn money to pay fro school herself; she soon finds out that her brother is stealing from her, and she then attempts to beat him up at Sunday School of all places.......

Tambu felt guilty about disliking her brother because he was her blood relation and she felt bad that she was blaming him after he was dead.