It is quite possible to meet a psychotherapist as a couple, when there are dysfunctions in the loving relationship. The therapist has to be trained to couples psychotherapeutic guidance. He will always stay impartial during the guidance, not taking one side, nor the other one, except if one's life is clearly in danger.
A Couple Therapy can also be dealing with an Individual Therapy at the same time, for one or for both. The goal stays for anyone to blossom, individually, and in the relationship. The Couple Therapy can occasionally turn into a Family Therapy, joining the children when necessary.