He begged her to stop cheating on him.

他恳求她不要再欺骗他了。

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Meanwhile, Mason has learned that Vanessa is cheating on him.

同时梅森发现瓦内萨在欺骗他。

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Your job is to follow some businessman's wife and make sure that she isn't cheating on him.

你的任务是要遵循一些商人的妻子，并确定她是不是对他的欺骗。

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You hear from other people that she's cheating on him.

你从其他人口中得知这女孩背地里对他不忠。

The thing is 课堂 - SpeakingMax英语口语达人

Batchelor said Pistorius once wanted to fight him because the track star thought his girlfriend was cheating on him.

CNN: Not everyone surprised at Oscar Pistorius' fall from grace

Before the crash, she was cheating on him with a real-estate agent named Brian Speer (Matthew Lillard), and, though Matt confronts her in the hospital, ranting vainly at her motionless form, what he really yearns to do is meet Brian, face to face.

NEWYORKER: Better Times

He played all the time and never caught on they were cheating him.

CNN: Excerpt: 'Joe DiMaggio: The Hero's Life'