From your posting, it sounds like your wife is thinking about where her friend lives. It also sounds like she's thinking out loud about it.

Listen, validate and offer opinions when asked right now. Some mlcers will toss things out to see the reaction of the lbs.

If I were you, I'd leave it alone. If she broaches the subject again, then you can voice your opinion. She may not ever bring it up again, there's no telling what was actually going through her head.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.