SAN JOSE, Calif.—Theranos founder Elizabeth Holmes testified on Monday she was abused by her former romantic partner and Theranos executive Ramesh “Sunny” Balwani and that the relationship had a pervasive impact on her life during the time when she is accused of committing fraud. During her fourth day on the stand, Holmes, 37, occasionally choked up as she spoke about her decade-long relationship with Balwani, Theranos’ chief operating officer, whom she met when she was 18 and he was 38. Throughout the relationship, Holmes said, Balwani forced her to have sex when she did not want to, and was verbally abusive. Balwani has “categorically” denied the allegations in court filings, calling them “false and inflammatory.” An attorney for Balwani did not immediately reply to a request for comment on Monday. Both Holmes and Balwani have pleaded not guilty to criminal charges for allegedly lying about the now-defunct startup’s technology that …