Updating Two Tables From One Form

I have a table called Primary Employees and another table called Secondary Employees. I also have a form where you can add new employees, which updates the Primary Employees table. What I would like to do is, after I add a new employee have the new data update both the Primary and Secondary table at the same time. These tables have the same information within them. These two tables are currently relational to one another, but I still have to go in and manual update the Secondary Employee table after I add a new employee. I have to have two databases because of other form requirements. Any help you could provide would be greatly appreciated.