Sorry to hear.
Quite a large group of us are plain trapped in there; would love to leave, but our family and friends are in. Also, for so many such as myself, having grown up indoctrinated, it's very difficult to see ourselves any other place.
Hey, perhaps you won't lose your family member; maybe with being out of the Organization for some time, he may have learned a way to keep it all balanced, by that I mean is to keep contact with the outside while still managing to stay inside the religion. It's what I do, really, to stay sane.
Go easy on the negative stuff you show, though, or he'll think it's Satan trying to attack him, then he'll avoid you like the plague. Just enjoy his company when you can and show him it's not all bad and evil outside of the Org.