move in with

move in with (someone or something)

To begin sharing accommodation with another person, group, or company. He moved in with his girlfriend after just three months. Seems awfully rushed, if you ask me. To save on expenses, we moved into a shared office unit with another company the same size as ourselves.
See also: move

move in with someone

to take up residence with someone. Sally moved in with Sam. Jimmy moved in with his brother and shared expenses.
See also: move