Do I have any legal property rights to allow or disallow a guest to enter my house? Here's a situation: I am married to my spouse. We don't have any intention of getting a divorce. My spouse wants to invite a guest to stay with us in our jointly owned house indefinitely (hopefully only for a few months). I unequivocally don't want this guest. Is there nothing I can do to legally stop this guest from staying, only because my spouse allows it? Can I do something physical like bar them from entering? Do my rights change if the guest was a family member of my spouse vs a total stranger? If the answer is that I don't have any rights at all, does this mean that I can invite anybody I want to stay in a joint tenancy / ownership house for as long as I want without considering or even consulting the other joint tenants / owner? This question is partly hypothetical, but highly relevant to someone I know. Thanks.