Perhaps she was an illegitimate daughter.

也许她是个私生女。

youdao

She borrowed and spent wildly, eventually spinning a yarn that she was the illegitimate daughter of Andrew Carnegie, one of American's wealthiest men.

她借钱无数，生活挥霍无度，最终编织了一个谎言，声称自己是全美国最富裕的人安德鲁卡耐基的私生女。

youdao

Mr Toledo, for example, has been linked to a pyramid savings scandal, and is alleged to have abandoned an illegitimate daughter.

ECONOMIST: Peru

The illegitimate daughter, Cosette would be an orphan.

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Born in 1028, William was the illegitimate son of Duke Robert I of Normandy and a young woman called Herleve, the daughter of a Falaise tanner.

BBC: 9 September