At his age Mr Kgomo wants a baby
Mr Kgomo told Ivy that he wants a baby, then Ivy just laughed at him and told him that he must be joking about this. At their age Mr Kgomo wants to have a baby. He is about to retire from his job, now he wants a baby.
I think this is a way of Mr Kgomo to cover his cheating scandal with Melita. He will tell Ivy that Melita will be the one giving him a child. He knows that if Ivy finds out about Melita then their marriage will be over.
He must just take Melita as his second wife because he wants her to have his baby. Melita is going to spend his pension money and it will be the end of him. He must pray that his plan works because he will lose his job, Melita and his wife.