The sensational allegations against the Minister of State in vice president Joice Mujuru's office are contained in divorce papers lodged by wife, Tsitsi, in a legal wrangle which now threatens to sink Nguni’s political career.
She alleges Nguni pumped several donations into Makoni's campaign, including a $20,000 donation she witnessed at their home in February 2008.
Makoni, for years a senior member of Zanu (PF) party, challenged President Robert Mugabe after walking out of the party in early 2008.
In court papers Nguni said his wife was hell-bent on harming his political standing by propagating "falsehoods" about his personal and political life.
But Tsitsi came back with guns blazing, stating "If I wanted to really hurt the plaintiff politically, I would have by now started questioning publicly how a sitting minister can financially support an opposition party at the last elections, then go back to supposedly toeing the party line," her lawyers said in an opposing affidavit lodged in the High Court.
"On many occasions he expressed his dislike for the President (Robert Mugabe) and would say he was the one who was letting his country go down. Nguni played an active role in persuading businesspeople to support his well-known political candidate," she said.
Her lawyers, Sinyoro and Partners, threatened to spill more sensational details about the minister's relationship with Makoni – a development which has infuriated Mugabe.
Tsitsi wants half of the minister's sprawling empire, but he has refused.
The court papers state: “If Mr Nguni has money to support the opposition political party and his collection of mistresses, he should surely give her (Tsitsi) what is due to her in terms of fair share of property which the couple acquired or upgraded together."
The name of the now late former army chief and Zanu (PF) kingmaker Solomon Mujuru was widely touted as being behind Makoni's campaign, but the divorce case claims Nguni as another Mujuru faction loyalist and backer of Makoni's bid.
Post published in: News