Quote: So my question is: What do you do when you know your S is thinking about the OP? Do you ignore it, confront it, ask questions or just suffer in silence?
None of the above.
"Act-as-if" your ASSumption (after all, you don't know for sure) that she's thinking about the OP is incorrect, and that it might just be something else.
"If it were me" , I think that I wouldn't really say anything. Maybe make a special trip to the room she's in, give her a hug, and say "that was all", and leave the room. Maybe bring her a nice cool or warm drink of whatever she likes. Do something that's small, yet special to her.
Bridge the gap of the distance you're feeling with a small action, not words, and see where it goes from there.
JJ
Read about Divorce Busting® Telephone Coaching here!