wrap someone around your little finger
US /ræp ˈsʌm.wʌn əˈraʊnd jʊər ˈlɪt.əl ˈfɪŋ.ɡər/
UK /ræp ˈsʌm.wʌn əˈraʊnd jʊər ˈlɪt.əl ˈfɪŋ.ɡər/
1.
to have complete control over someone and be able to persuade them to do anything you want
:
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She can wrap him around her little finger; he'll do anything she asks.
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My youngest child always manages to wrap me around her little finger to get what she wants.