The Secret Life of Cash App Founder Bob Lee: Sex, Drugs, and a Fatal Affair.

Cash App founder Bob Lee was having an affair with Khazar Momeni, the sister of his alleged killer, Nima Momeni, according to sources. Both Lee and Khazar were part of an underground party scene in San Francisco known as "The Lifestyle." Nima is in jail on murder charges for the fatal stabbing of Lee last month. Lee and Khazar had reportedly been drinking with friends at a house party prior to the altercation. Lee's wife said he was not a "party boy," and police arrested Nima on April 13 and he plans to plead not guilty.