Do you work with an assistant?
Most of the time I work with no assistant. Being a wedding photographer means catching action at the moment. So I need to be reactive, act quickly, and adapt myself quickly to the situation. An assistant would be very useful for your couple photo session. He can carry a reflector or flashes and make the light better. Better light means better pictures. Similarly, in a very dark place, with no good light system, he can be useful. Assistant is an option you can consider taking depending on your situation.