Since none of us were actually there, and Wifey is obviously not stupid, it is hard to say she made the wrong decision. Second guessing is easy when you were not the one making the decisions in real time. It has been my experience that those who say "I would have done ..." probably have little actual experience dealing with the criminal element.
Did someone say she made the wrong decision?
The question is could she have made a better decision?
Usually after such a situation one can sit back and think they could have done things better. Which I think is one of the points of this discussion.
Since the OP's wifey was successful she made the right decision. However, she did increase her risk. What would she have done if the man had attacked and the weapon malfunctioned? Has she done weapon clearing drills? Can she do it under pressure? Would she have time?
If she was in the house and the stranger was attacking the door she has much more time to deal with a weapons problem. Out in the yard she ain't got much.
What if the man had simply walked at her? What would she do? If she shoots him she now has a very big legal problem since she shot an unarmed man. The questions from the DA and/or the opposing lawyer in the civil suit are not going to be fun to answer.
Even pointing a weapon at the stranger could be a problem. Check the earlier posts for an example.
Next time what if a stranger approached her in a calm way with a piece of paper pretending to ask for directions? Is she gonna shoot him? Nope but it would allow him to get real close. Too close. If she is in the yard she has more risk. In the house risk from the stranger is reduced greatly.
Just because one is in the house does not mean one has to STAY in the house. The house buys time, cover and possible concealment. Time allows one to see what the stranger(s) is doing. How many there are. Weapons? ALL of which are to YOUR advantage. Not the other guy. Why give up the advantage?
If one has to get in a fight, set up the circumstances to be in your favor, not the opponents. That includes the fight itself and the aftermath.
Later,
Dan