I'm glad most of your family aren't in the religion HeyThere. You have a good support system. Your marriage is important and beliefs run deep so softly softly sounds good.
Perhaps you could stop FS on the basis of you don't feel it's right to preach something you're not sure of but without the formal need to announce to anyone you are stopping? I like the idea of sometimes going with your husband to meetings to show him how their attitudes to you will change which they will.