The teenager, from Leeds, was supposedly told she would “live like a queen” and that rejecting the proposal would “bring shame” on her parents.
She also said her mother had pressured her father into hitting her, based on the belief it would stop her “rebelling” against the marriage.
The teenager, who was studying for her A-levels at the time, had told her mother that, even if she was forced to marry, she would file a report to authorities saying what had happened.
She told the jury: “But my mum said there was no way that that would happen, because they were going to leave me there for a year so that I would get pregnant so that he [the first cousin] could get a visa.”
With the help of her younger sister, she was able to contact the British High Commission, who rescued her days before the wedding was due to take place.
The new offence of forced marriage came into effect in June 2014, but prosecutions have been rare.
Last week, the Birmingham mother was jailed for forcing her daughter to marry a relative almost twice her age.
If you or someone you know has been affected by forced marriage you can find several organisations that may be able to help here.