When a roommate's guests overstay their welcome
Talk with the roommate who invited the guest. State the pattern: number of nights, use of common space, bathroom impact, noise, or safety concern. Ask for a specific change and refer to the household agreement if one exists.
Clarify notice, frequency, overnight limits, and whether a longer stay needs household and landlord approval. Do not confront the guest as though they are the decision-maker.
Guest boundaries protect the home without requiring anyone to justify their relationships.