 Soon after her release from detention, Wambui met Silviano Melea Otieno, a prominent lawyer of Luo heritage based in Nairobi, and the couple married in 1963.Otieno accepted the four of Wambui’s children born before their marriage as his own, the couple had five children and also fostered the six orphaned children of a deceased friend of Otieno.All 15 children were well educated; their daughter, Gladwell Otieno, attended universities in the United States and Germany and one of her brothers and a foster brother attended United States universities.Gladwell Otieno worked for Transparency International in Berlin and was Executive Director of Transparency International Kenya and is founder and Executive Director of "AFRICOG", the African Centre of open Governance.