She is under an obligation to her adoptive father.

她有义务赡养她的养父.

《简明英汉词典》

She lived with her adoptive father.

她和她养父生活在一起.

辞典例句

His adoptive father is ill, he is anxious too.

养父生病了, 他也很担心.

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My adoptive father is nicer to me than to his own son.

义父对我比对自己的亲生儿子还要好.

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His adoptive father died 2 years ago.

他的义父两年前去世了.

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