I don't recall it being written anywhere in WT literature that purchasing candy on sale during the holidays is tantamount to celebrating those holidays.
1 Cor. 10:25-30 -- 25 Everything that is sold in a meat market keep eating, making no inquiry on account of YOUR conscience; 26 for “to Jehovah belong the earth and that which fills it.” 27 If anyone of the unbelievers invites YOU and YOU wish to go, proceed to eat everything that is set before YOU, making no inquiry on account of YOUR conscience. 28 But if anyone should say to YOU: “This is something offered in sacrifice,” do not eat on account of the one that disclosed it and on account of conscience. 29 “Conscience,” I say, not your own, but that of the other person. For why should it be that my freedom is judged by another person’s conscience? 30 If I am partaking with thanks, why am I to be spoken of abusively over that for which I give thanks?
WT 10/01/2010 " Paul’s point was that, although Christians would not share in pagan worship, meat that had been sacrificed in a temple was not intrinsically contaminated ."
Thus, purchasing discounted holiday candy after the holiday has passed is not sharing in the holiday either.
However, Gary, it certainly sounds like the Mrs. is trying to straddle the fence -- wanting to keep one foot in "Paradise" and the other in the "world". I would suspect her eyes are opening. Still, I can attest that it is still very hard to just walk completely away from it all. In it are many friends and the guarantee of living forever in Paradise if you don't give out before the END that is very, very close!