I am pretty sure you know this but please don't think my thoughts on fading in any way would be advise in accord with deceit. I thnk lying in any form takes away a persons integrity, and the only way to get it back is to tell the truth. Its an ugly buisness. But you don't have to tell someone everything on your mind in order to be telling the truth. Truth has branches. But the stump is still the truth. Give them the stump and feel it out. I guess I am just thinking don't act emotionally. Having your mind somewhat free makes it harder to relate to those still "in" in ways most if not all of us here don't give enough credit to. A simple statement from me that seems totally normal, all of a sudden sets the hairs on the back of someones neck on fire. Why? I don't "sound the same". I can't use the same "pure language" lingo without feeling like I am once again, giving back to the GB that I no longer seaks exclusively for God. (that is a great example of a phrase that would instantly label you an apostate)
May I ask what it was that kind of got the mind flowing? Do you still have any beliefs you hold onto in particular? I certainly don't mean to pry. PM me if you feel like it.
My personal thought knowing nothing about you, is go to him with something you think is iron clad and tell him you are kind of agonizing over it. Ask some questions, seek his advise so to speak, and leave it open and undefined for future conversations. Patience is the only way out of this with your family. Let me tell you it is grueling. I am making headway with my wife. For the first time in 6 months, I believe she will unequivocably be loyal to me over the elders. That is a pretty big deal! It has taken alot of time. I made alot of mistakes along the way. Still working on it.