keep it in the family

keep it in the family (third-person singular simple present keeps it in the family, present participle keeping it in the family, simple past and past participle kept it in the family)

1. (idiomatic) To restrict knowledge or information to only the members of a family or another small, intimate group.
2. (idiomatic) To remain loyal to one's family; to retain family ownership of a business for long period of time.