Somebody with far more wisdom will answer beyond me, but revolvers are dead easy for novice gun users. A .357 revolver is not a bad choice as you can load it with .38sp personal defense loads and it'll be a gun that your wife can likely handle without any issue.
One thing to keep in mind, if it's JUST for home defense, don't be so quick to buy something super small. The smaller they are, the harder they are to shoot accurately IMHO. I had a charter arms .38 snubby that was so bad I probably couldn't have committed suicide with it because I'd miss. I sold it quickly.
One thing to keep in mind, if it's JUST for home defense, don't be so quick to buy something super small. The smaller they are, the harder they are to shoot accurately IMHO. I had a charter arms .38 snubby that was so bad I probably couldn't have committed suicide with it because I'd miss. I sold it quickly.