I was surprised to read that he even said "yes" the first time, for the very reason that you experienced: couples counseling could be needed again. Because he's an intern, he might not have known the implications until you called back to see him again for couple's counseling. It's too bad he didn't make this clear with you.

I have a friend who asked her therapist to continue with individual therapy after couple's counseling ended. Her therapist said no. Five years later, she asked again and the therapist said it would be okay as long as both parties agreed.