Suzie S. answered 04/11/19
Accent Reduction *Specialist* - University Teacher in US and Abroad
I have worked with couples, however, I think it is important to have individual time in addition to both together. While you may have the same native tongue, you do not have the same physical structures, backgrounds, and training. Also, personalities can hamper one or the other learner.
There are benefits to "together time" - with good boundaries and understanding.