Dorothy Dandridge was born on November 9, 1922 in Cleveland, Ohio, to aspiring entertainer Ruby Dandridge (nee Butler) (March 3, 1900 - October 17, 1987) and Cyril Dandridge (October 25, 1895 - July 9, 1989), a cabinetmaker and Baptist minister, who had separated just before her birth. Ruby created a song-and-dance act for her two young daughters, Vivian and Dorothy, under the name The Wonder Children, that was managed by Geneva Williams. The sisters toured the Southern United States almost nonstop for five years (rarely attending school), while Ruby worked and performed in Cleveland.

Dandridge married dancer and entertainer Harold Nicholas on September 6, 1942, and gave birth to her only child, Harolyn Suzanne Nicholas, on September 2, 1943. Unfortunately, Harolyn was born brain-damaged and required constant care. By 1948, their marriage had deteriorated and Nicholas abandoned his family. Due to his adultery and abandonment, the couple divorced in October 1951.  While filming Carmen Jones (1954), the director Otto Preminger began an affair with his film's star, Dandridge. It lasted four years, during which period he advised her on career matters, demanding she accept only starring roles, advice Dandridge later regretted accepting. She became pregnant by him in 1955, but was forced to have an abortion by the studio. She ended the affair when she realized that Preminger had no plans to leave his wife to marry her. Their affair was depicted in the HBO Films biopic, Introducing Dorothy Dandridge, in which Preminger was portrayed by Austrian actor Klaus Maria Brandauer.  Dandridge married Jack Denison on June 22, 1959. They divorced in 1962 amid financial setbacks and allegations of domestic violence. At this time, Dandridge discovered that the people who were handling her finances had swindled her out of $150,000 and that she was $139,000 in debt for back taxes. Forced to sell her Hollywood home and place her daughter in a state mental institution in Camarillo, California, Dandridge moved into a small apartment at 8495 Fountain Avenue in West Hollywood, California.  Dandridge became involved with the National Urban League and the National Association for the Advancement of Colored People. As a result of the racism she encountered in the industry, she developed an interest in activism.Answer this question using a quote from the following article:

How were they able to force her to have an abortion?
She ended the affair when she realized that Preminger had no plans to leave his wife to marry her.