The downside of things is that her sister left her husband a couple of years ago and is now newly married and our neighbours that we hang with at times have just split up a month ago and they've been married a similar length of time. I read somewhere here the theory that people see those around them splitting and they are more likely to critically analyze their own marriage as well and decide it is better to get out.
Mindreading. You'll drive yourself crazy with this, and most of the time it won't be accurate anyway. She could just as likely see someone like that and say "That's a shame; they didn't even work at it. If I ever leave Q1 for good, it won't be without working at it more first." You never know what a wayward or a walk-away is thinking, and it's usually very different from the way they USED to think.