Hubby could have kept her happy and enjoy many years of money and peace. Make no sense.
This is very rare among most kenyan women, who believe that a man's salary belong to family, while empowered woman salary belong to woman alone.
Many situation like this could result after a man invests in a woman hoping he's investing in future family. Things turn south when woman start making money and tells man she can do whatever she wants because she's independent.
I think we are at cultural crossroads breakpoint with mixing incompatible western and traditional African culture. Something gives in soon..