On 30 May 1975 Craven married Martha Jacoba (Merlė) Vermeulen, the widow of Cape Town detective Dirk Vermeulen. Merlė worked in the fashion industry as a buyer for a chain of stores, and so had to attend fashion parades. After one such a parade in Pretoria, she twisted her ankle badly at her hotel. A bystander introduced her to Craven as "a doctor" who "knew a lot about ankle injuries". After Craven treated her foot, he telephoned and arranged to meet her again, and their relationship developed.