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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There was once a wife so jealous that when her husband came home one night and she couldn't find hairs on his jackets she yelled at him, "Great, so now you're cheating on me with a bald woman!"

有位妻子嫉妒心非常强，以至于有一次，他的丈夫在夜里回来，她在查找了他的夹克没有发现头发之后，便冲着她的丈夫吼道：“好啊，你欺骗我，你现在竟然和一个秃顶的女人在一起。”

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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'