Maybe this will make you feel better,....maybe not. Some people cannot handle the truth. They simply are not ready for it, and may never be. Now, if you really believe the bible is Gods's word, then you must realize that the truth will bring a sword. That may very well be our family members. Facing truth means facing fear, just like Paul Atreides from DUNE. Ok, that was weird, but I love that movie! Anyways... people are fearful of truth, change, success, death, you name it. The more fearful a person is, the more they can be controlled by others with " satisfying scriptural answers."
Jw'ism is a materialistic religion. For all their talk of faith in the " things unseen", they worship an Organization with the GB as their collective Pope. Reality scares them, they NEED an answer for everything. Just look at CTR's writings. Trying to answer everything leads to speculation, which if left unchecked, become dogma. The speaker at our KH today said that we have a paradise NOW. WOW, talk about going beyond what is written! Jw's are having their ears tickled by being told that they have a spiritual paradise NOW. That is hard to give up. Facing your mortality is hard as well. Your Mother has just not reached the point where she questions anything from the WTBTS, or she is not asking the right questions.
As far as lying... If GOD allows the Devil to have control of the world, and we are thrown in the meat grinder until we die, why would HE judge you for having to suffer in it? Are we supposed to martyr ourselves and destroy our families? We are to be cautious as serpents. I would not destroy someone's snow-globe world off-hand. Trust me I KNOW what you are feeling. My wife is a GB worshipper, and my kid is well past baptism age. An old maid by JW baptism standards. I am caught in the middle. Do I lie to my child? NEVER! Must I be cautious? Yes! My wife has said that she will not live with an apostate. If I get all cray-cray and my wife divorces me, what will that do to my child? It's a tightrope between teaching my child to reason and coming of as having spiritual hydrophobia, to quote CTR.
The wind blows where it wishes. YOU have to think this through. No one can tell you what to do. I wish I could give you an answer, but I can't. I can be your friend, and help you through whatever you experience. That's the best I can offer.