Set some ground rules to manage your expectations. Both of you need to be clear with what you expect of with each other during this long distance relationship. Set some ground rules so that none of you will do things that will take the other party by surprise.
As air is pulled from the attic space by the turbine vent, ridge vent or even an electric powered fan, the same amount of air must be allowed to flow into the attic space where the roof passes over the exterior walls of the home.
In new construction, the plumber will install a separate vent for any plumbing fixture that does not use the vanity vent. If a fixture has its own vent line, the line will run vertically to the attic and tie into the vent-and-soil stack if possible. If not, a separate roof exit is necessary. Alternately, the vent pipe can exit the home through an exterior wall, with the opening covered by a vent plate.