A Neighbour's Repeated Parking Problem

You rent the lower floor of a house in Maple Crossing, Ontario. Your lease includes the parking space beside the garage because you often return late from work. For the third time this week, your upstairs neighbour, Priya, has allowed a visitor to park there. Tonight, your car is on the street, where overnight parking is not permitted. Priya apologizes but says her visitor will leave sometime tomorrow morning. You want to keep a friendly relationship, but you need access to your space now and want the problem to stop.