Generate a question that has the following answer: His father for the following movie plot: Jorge is a young man whose plans for the future are put on hold when his father has a stroke. For seven years, he diligently nurses his father and works as a janitor while studying part-time to get a business degree. When Natalia, his childhood crush, returns from a stint studying abroad, Jorge begins to yearn for something better. He is desperate to find a new and better job, but finds that no one will hire him because he has experience only as a janitor. Antonio, Jorge's older brother, soon to be released from jail, is an opportunist who has never gotten along with their father. In prison, at a theater workshop, Antonio meets Paula, a beautiful young woman in jail on drug charges. Paula has a problem because she flirted with another inmate's boyfriend. Violently harassed in jail, she wants to get pregnant in order to be moved out of harm's way into the jail's maternity ward. Antonio initially just wants to have sex with her, but soon he falls in love with Paula. He wants to help her to get pregnant, but he discovers that he is sterile. Everything changes when Antonio gets out of prison. He plays on Jorge's good nature to get him to step in during conjugal visits and help impregnate his jailbird girlfriend, Paula. Jorge reluctantly agrees, even though it might get in the way of his long-term on-off relationship with Natalia. Meanwhile, Jorge's best friend Israel secretly photographs men visiting an erotic masseur. He finds out that his father is one of the clients and thinks that he is gay. Irritated with his father's hypocrisy, Israel initially starts anonymously blackmailing him. However, he later begins to question his own sexuality when he dares to visit the erotic masseur, following in his father's footsteps. Jorge's relationship with Natalia becomes difficult after she tries to get him a job where she works but he is only offered a position as a janitor. Then Antonio finds out that their father has an undisclosed bank account full of money. Jorge makes regular "face-to-face" visits to the women's...
A:
Who does Israel anonymously blackmail?