I gave the pretence of still being "in" while my father was alive. The last two years of his life were very fragile, I had already faded, but telling him I no longer wanted to be a JW would have put too much stress on his fragile health. I was the youngest of his first marriage and the only one that stayed a JW after the age of 16.
Once he was gone, I stayed "in" on the pretence with my step mother till she got back on her feet. I attended a few meetings with her (we were in different congs) so she didn't have to be alone and for support.
I then made the decision to tell her that I no longer wanted to be a JW. It was not a pretty scene!! Any JW family I had other than her and my half sister, I had no dealings with anyways, so it was no big loss to lose them. I did lose my step mom and half sister for a time, but they came around and said they wanted a relationship with me regardless of my beliefs.
I could no longer live a lie and the hiding and pretending was just too much. I made the decision and all the fallout and consequences and loss that I knew would happen and it was the best thing I ever did.
Everyone is different. I can say that now I can look at myself in the mirror and know that I stood up for myself and my beliefs and my health (mentally physically and emotionally) and be proud of my decision.
Life is too short to live a lie and pretned, IMHO.