The couple are so determined to keep it a secret that they have even told guests at their baby shower to bring gender-neutral gifts.
"We have told people who are coming to the baby shower that they should bring clothing in neutral colours or unisex clothing. We want it to be a surprise from God and all our friends to participate."
Mthokozisi, who lost an infant son in 2013, told TshisaLIVE earlier this year that his only prayer now was that his child with Nandipha would be born healthy.
"As excited as I am to be a dad, it reminds me of my first child and I just pray, it is my deepest prayer, that this baby is fine and healthy. It is a blessing from God and I have faith that he will watch over us all."