You don’t have to justify your choices. You need to move out, even if temporary although I am nearly 💯 that if you removed yourself and sought treatment then, you will not come back.
The more I read, the more your story resonates with me. His needs ain’t your problem, you do not owe him sex or your body BUT you are struggling to internalise this belief because 1. You are married and 2. You have consented before. This is very likely original from your original SA. It is clear you did not deal with that at the time, and that initial experience with your husband triggered the trauma because your body remembers. The fact that you didn’t think that him having sex with you while asleep is a rape, until you posted, reaffirms this. THIS is direct repeat of your original SA at university when you were unconscious! Your brain and body survived by normalising this, and the fact it is not normal is causing cognitive dissonance.
It is very common for SA victims to have multiple perpetrators and relationships that mimic the original abuse, because it feels normal. It happened to me too. In retrospect the relationships/dating situations I was in between 2015 and 2019 were sexually abusive or going this way through coercion. One ended with police in my house following stalking, and death threats, which is what got me cPTSD “diagnosis” and got referred to New Pathways.
Like you, I minimised and tried to explain it all away. The length of time they kept me in therapy was indicative of the seriousness of the trauma regardless of how my life looked on the outside. Your therapist cannot tell u to leave, but she also won’t agree with your situation is healthy which is why it may seem she is not “understanding you”. She probably is, but you are in survival mode.
As someone else said, therapy won’t be effective when the abuse is ongoing. Your environment is not safe ams that includes emotional and psychological safety. You are enduring and I am sorry to say but you cannot process or recover when your body feels unsafe. You need to move out or ask him to mo e out.
If he is that great, loving, understanding husband you say he is - he will understand and will. Give him your blessing to have sex with someone else.