Harare - Zimbabwe’s controversial first lady, Grace Mugabe, has lashed out at the country’s Vice President, Emmerson Mnangagwa, while launching the Empowerment Bank.This follows claims by Mnangagwa that he had been poisoned at a political rally. Zimnews reports she screamed: "I’m the First Lady and Mnangagwa a nothing. He was employed by my husband. Why would I kill him?"I can’t prepare one cup of an ice cream to kill Mnangagwa. Who is he? I am the wife of a president!"Mugabe said Mnangagwa claimed to have been poisoned, but had since done changed his tune.ALSO READ: Mugabe's deputies in unprecedented public spatAccording to The Herald she added that Mnangagwa gave different versions depending to his audience. Youths were warned to stay clear of "games" such as this. “When you go around saying all nonsensical stuff, it means you have failed in politics.” She added that Mnangagwa "should stay home". The Empowerment Bank, which has the president’s daughter, Bona Mugabe, as one of its directors, has had treasury release $10m for its unknown operations.