When she refused, Castro claims that Sterling told her "he would file a lawsuit against me to get back everything he had given me and that he would force me to hire attorneys and spend everything I owned so that I would go broke, and be forced to return to him for financial support."
Sterling acknowledged the pair's relationship, but said it was purely sexual, according to court documents.
He described Castro as a money-hungry "prostitute," a "piece of trash" and a "total freak," according to excerpts of sworn depositions on file in Los Angeles Superior Court -- and he shared intimate and graphic details about his version of their sexual encounters.
"Every time that girl saw me she grabbed my body," he said, according to a transcript of his deposition. "She wanted to pull something and have sex."
He called sex with Castro "the best of the best" and described many occasions "all over my building, in my bathroom, upstairs, in the corner, in the elevator," according to that transcript.
"That's all it was is sex, nothing more, nothing less. I didn't want to have any more sex with her. I couldn't physically," he said in the document.
In her 2003 declaration, Castro also said she was aware of Sterling's allegedly discriminatory real estate tactics, including what she claimed was his stated intention to allow only Koreans to live in his rentals in a Los Angeles neighborhood known as Koreatown, and instructing building managers to not cash the rent checks of tenants he wanted out, so he could evict them for missing payments.
Sterling paid $2.75 million to settle a 2009 lawsuit brought by the U.S. Department of Justice involving allegations he discriminated against minorities at apartment buildings he owned in Los Angeles. He denied violating laws but promised an independent contractor would monitor his company's compliance with the Fair Housing Act.
Sterling’s suit against Castro was dropped when the pair reached a private settlement that came as a surprise to Castro's own attorneys, who were not involved in the negotiation. That triggered another suit from Castro’s lawyers against their former client, claiming that she owed nearly half a million dollars in legal fees, court documents state. In a notable twist, Sterling’s attorney, Doug Walton, stepped in to represent Castro.
Sterling paid $200,000 to settle the fee dispute with Castro’s original attorneys and the lawsuit was dropped, according to correspondence between the attorneys obtained by ABC News.
Years later Castro claimed in a deposition with Justice Department attorneys that she had signed the declarations in the dispute with Sterling without carefully reading them, contradicting her signed statements about Sterling’s racial comments about tenants, claiming she had never heard him say anything like that. Sterling has also denied her previous allegations about his business practices. That deposition was related to Sterling's 2009 housing discrimination suit.
Walton could not be reached for comment.
Robert Platt, Sterling's current attorney, declined comment.