HARARE – A high-stakes divorce dispute between businessman Wicknell Chivayo and his ex-wife Sonja Madzikanda has escalated, with Madzikanda demanding a US$25 million lump sum, US$40,000 monthly maintenance and a fleet of luxury vehicles. The demands are outlined in court papers before the High Court’s Family Division, where Chivayo is also seeking interim access to the couple’s two minor children.