Explained: What Uhuru Kenyatta meant when he said"My wife's brother mother is married to a Jamaican

Kenyans were quick to laugh at president Uhuru Kenyatta.
Uhuru Kenyatta who is in Jamaica was being questioned whether Jamaicans are in Kenya.
He was quick to say yes and went ahead to explain that .
My wife's Brother mother is married to a Jamaican.
Kenyans questioned why he didn't simply say mother in law.
Well Margaret Kenyatta father
Had two wives
A German and Jamaican.
The German gave birth to Margaret while the Jamaican gave birth to Uhuru Kenyatta brother, thus explaining Uhuru Kenyatta statement.