She finished with him when she discovered he was having an affair.

他们分手了，因为她发现他出轨了。

youdao

When she discovered her baby had disappeared, she was greatly frantic.

她发现孩子不见了，大惊失色。

《新英汉大辞典》

Miao Wei, 50, was cleaning when she discovered the cluster of white flowers under the washing machine.

50岁的妙微miao Wei在打扫卫生的时候，发现洗衣机下有一簇白色花。

youdao

She says that when she discovered the songs of British pop stars David Bowie and Queen, she realized these different things could go together.

VOA: special.2009.02.27

Susan was about ten years old, growing up in the Midwest, when she discovered Nancy Drew.

VOA: special.2009.08.24

When she started painting she discovered she could express herself with color and canvas.

VOA: special.2009.07.31

When she discovered I'd just left Poo-Pourri she couldn't have been more supportive of their efforts.

WSJ: On the Scent of a Hit

They hit a rough patch awhile ago when she discovered he cheated.

FORBES: The Cougar Relationship: Making It Work

For Ms. Diedrich, the journey from nurse to clothes seller began last May when she discovered the Poshmark app while browsing the Apple App Store.

WSJ: Apps Spawn New Jobs, Services