OR ....you could just tell the Elders ,if they ask, that what you discuss within your own home is no one else's business.
This could work. Because at this point your wife is only one witness to your doubts/apostacy. Is it possible they could drag anything out of your teenager to make (s)he the 2nd witness? (Yes, some will stoop that low.) And, hopefully you haven't shared your doubts with any other JDub that could cause problems.
You haven't given us much background info, but if it's as simple as what you've explained, then I actually think this is the route I would take. Simply tell them your wife is confused about things and you've been trying to explain the adjustments the F&DS have made. Tell them to ask her to explain how we prove from the Bible that Jesus chose IBSA in 1919. She can't. (They can't either.) Then STFU. Deny. Deny. Deny.
Please forgive me for being so frank BUT I think it's totally out of order that she "grassed" you up to the Eldubs. I would go mad if my hubby had done the same to me. Her loyalty should lie with you, not those imperfect men . . . . You need to sit down and talk to your wife about your marriage. Urgently.
I agree with quelly. The elders are the least of your problems. You have SERIOUS problems in your marriage. Depending on the dynamics in your relationship there are a lot of different approaches I'd take there.
For example, since I am the sole breadwinner here, I'd probably cut up her credit cards and never put another $$ in a joint checking account. When she asks what's up? DISLOYALTY. I'd also start a Journal documenting any kind of disloyal action. They carry a lot of weight in court.
I'd also start missing meetings and Field Service. Maybe not all, but I'd make damn sure it's understood that I don't have to go if I choose not to do so.
Please do not discuss matters with her family members that are active JDubs --- they will just prove to be the additional witnesses the Elders need against you.
Doc