get hooks in

get (one's) hooks in

To gain control or influence over someone or something, especially with an ulterior motive. Because of my family's fortune, my parents always worry that any girl I date is just trying to get her hooks in.
See also: get, hook

get one's hooks in(to) someone or something

 and get one's hooks in
Fig. to obtain a strong and possessive hold on someone or something. She just can't wait to get her hooks into him. He finally got in his hooks and guarded her jealously.
See also: get, hook