I'd hate to say anything bad about your wife on this matter. It was a very thoughtful gift. There are three things I think women should understand about their husbands. Don't buy them tools, cars, or guns. The gun is actually reasonably reliable and wouldn't be a bad choice for somebody on a very tight budget. The problem you run into with skimping on the gun is that to be proficient with any gun, you should pump at least 200 rounds through it and about a box every month or so. This much shooting eats up more money than was paid for the gun in the first place. Add to that holsters, cases, cleaning equipment (if you don't already have it) and you realize that the gun itself is not the most expensive portion of the purchase.
There is one thing that I'll add. I once got a Christmas present from my wife. She bought me a woodworking bench. I had talked to her many times about getting a bench for reloading and she thought she was doing me a favor. I was torn so much that I almost kept the thing. I didn't need it and didn't have the room, but I still regret the whole situation. She has since not bought me much. I sat down with her and talked it over. We agreed that she can buy me clothes (and should), videos, food, art, prostitutes, etc. But she will NOT buy me tools, cars, or guns.
I'd keep the gun. Get some lapping compound and lap the frame / slide contact surfaces so that it operates well. Make sure to remove it all. Treat the gun like a tool. Keep it in the camper, boat, car, or garage and let your wife know it was well appreciated.