Run of the House
(The). He has the run of the house. Free access to it, and free liberty to partake of whatever comes to table. A “run of events” means a series of good, bad, and indifferent, as they may chance to succeed each other. And the “run of the house” means the food and domestic arrangements as they ordinarily occur.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894