(((walk))))
I would hope that your husband would go with you to couples counseling, but not with your own therapist. If he needs to drive you, maybe your T could help suggest he sit in the waiting room (instead of intruding upon your session?)
Your T is protecting you and your information by acting surprised to anything the spouse says. You wouldn't want your spouse to "know" all that you have told in private to the T, trust me. Plus, the T is still YOUR T. YOU are her primary patient, not him, not the both of you...and she is protecting you. (((hugs)))
If you can't bring up the subject of going back to private sessions while your spouse is there, then call her and ask about these things. You have every right to have private sessions without your spouse