So sorry this is no casual invite to encourage but an ambush in the making. Your wife does not agree with you and has already allowed the elders to fill the spiritual void and so who knows what she may have already confided to them. If they have already asked the loaded question then the hunt is on. When things have got to this stage they tend to take on a momentum of their own.i would talk to your wife and ask her what she thinks prompted the sudden interest. If this is a prejudicial she will have already been spoken to. If you can stall but be aware that if they are suspicious it is very difficult to divert the train.
Doubts are permitted if they are wishy washy, specific criticisms are not. When your spouse is still controlled then you do not have the same freedoms.