My XH and I saw my individual T for couples therapy. It worked really well for us. However, my T is a Family Systems therapist, and they are trained to see different combinations of family members from the same family. They know how to handle this. Can you ask your T if they have done this before and have the training? Also, ask in their opinion what are the pros and cons? My T told me before we started that some clients can't handle it as they get jealous of having to share their T in the session with another person. He said he tries to be sensitive to this and be sure to give a strong presence of himself to both members of the couple so that each feels paid attention to and not abandoned. He said some clients cannot get past this, though, and in that case he recommends that the couple see another T for marriage therapy. I think the easiest way to find if it will work for you is to have a couple of joint sessions and see how it goes. Good luck.