I see my own T and if my husband wants to go to therapy for himself someday he will have a different T. On the subject of marriage counseling we went to a T that neither of us had seen before. In marriage therapy I felt a connection with that T and she said she wouldn't take me on as an individual because of a conflict (legally if she ever had to go to court and testify it puts her in a conflict of interest when it comes to representing either one of us - not that we have any problems that require a court room :-). However she did agree to take me on for two - three sessions to try EFT as it relates to my marriage (in addition to me seeing my old T). After that she recommended another T to me and I ended up finding T 2 who specializes in trauma.

It's your decision but from my experience I think it would be best for you and your partner to have separate individual T's and a separate marriage T.

Best of luck!