Tim,
If your wife is going to hunt deer in Pa get her a rifle. A 20 or 12 gauge will kick the **** out of her. A 12 gauge slug compares in recoil to a .300 Win. Mag. rifle shell. A nice .243 or something like it will work better and be alot more comfortable for her.
If you or her are hell bent on a shotgun, buy something that you have no problem cutting the stock.
I shoot a fair amount of trap and have seen countless people take a beating from their gun and shoot poor scores because the wood was "to pretty to cut" or "if I cut the stock the value will drop". Both of these statements are pure B.S.! A ill fitting is worthless. Also do not get her the lightest gun you can find, get her the heaviest gun she can carry and handle. It is all physics, it takes more energy to more something the heavier it is. 1/2 a pound in a gun weight makes a world of difference in recoil. This still doesn't make up for stock fit as that is the most important thing in shotguns.