Please call him if you can. He needs to refer your husband out. It sounds like he knows that... I'm sorry that he spent most of your session talking about working with your husband, that sounds really frustrating and not helpful...

I'm not sure if you're ok with calling/emailing your therapist (it terrifies me, but I haven't really had a great therapy relationship yet). In this case, part of why I think you should call and not wait is...

1. It's clearly upsetting you.
2. I'd want to be clear with the T about this ASAP, before he schedules any more appointments with H. The longer this goes on, the harder its going to be to get H to see another T, and the more damage it does to you (the more info gets shared, the more the boundaries and relationships get confused). It's time-sensitive.
3. It sounds like your T wasted a big portion of today's session talking about your husband.

Just my observations... hopefully someone else weighs in soon, since as I said, I'm not married (and never have been). I can tell you though, I've thought about having various family members meet up with my T, and even that is a big NO for me. I really need my T to be on MY side, to support ME and I don't know how he can clearly do that if he's also being a T to your husband!