Different churches may have different etiquette standards. I think in this situation, you and your husband should schedule a meeting with the Priest. I am sure that he can come up with a solution that both includes your husband in the service and makes sure that you do not feel uncomfortable and do not look separate from your husband.
I have been in your situation and I have gone with friends to other houses of worship. While my friends may kneel and do other things during the service, I do not and most of the churches I have been to have others who do not as well. It really depends on the church and who is running the show sort of speak. I would meet with the priest and then go from there.