Sipho's very pregnant sister was in a car accident. Upon her coming out of the coma, she immediately asked about her unborn child.
The doctor congratulated her on having twins, and assured her that all was well.
Well then, where are my babies she asked.
Well your brother Sipho has them with him, and he also gave them names for their christening.

The woman was horrified, as she new that Sipho was not the most clever person on the block. Just then Sipho walked in with the 2 babies and handed them to her.

She looked at the girl and hesitantly asked Sipho - What is her name Sipha.
Denise he answered smiling from ear to ear.
Well that is a good name the woman thought, obviously expecting something much worse from Sipho.
And the boy? What is his name.
Denephew Sipho replied.